Is hosting the right way of thinking?

Question

Billing systems

Good afternoon. I am interested in the opportunity to raise for my needs (there are a couple of projects that I would like to launch, but resources are required that are expensive if bought from scratch and somewhere on the side, but I have my own ownerless hardware) hosting. Can you tell me the right way of thinking about infrastructure? And in general, I would like to hear from people who are in the subject some good advice.
Infrastructure: 1) the router provides Internet access. 2) a virtualization server with a hypervisor (I give 70% of the resources to the main task, the remaining 30% will go to another pair of virtual machines for other purposes unrelated to hosting). 3) network storage (large storage, for storing virtual disks of machines).
I install an OS on the hypervisor VM, on which I roll up the billing + hosting panel. Billing is needed because there are a couple of people who ask to share resources - I want to have process automation so as not to think, not to guess and not to follow with a pen, notebook and calculator.
1. Can you tell me a budget and/or free bundle of billing + hosting? Of course with the ability to Russify yourself or already with the Russian language.
2. Am I right in thinking that inside the virtual machine you need a large disk that is stored on the storage system and, as it is used up, increase its size and add disks to the storage system? Or you need to create only a system disk, and forward the folder (well, or via iSCSI) to the storage system in the hosting OS - where everything will go. Which option is better, more stable, scalable, more reliable?
3. The question is not clear how to connect an external white IP address to a specific user's virtual hosting? I need to connect 2-3 addresses to 2-3 hosting accounts - how does it work? What kind of router do you need? How is it generally prescribed and where is the most interesting? Here the address provider gave me white pieces 5, for example, and what to do with them, how to connect them and use them? For example, I set a static address in the router and forward port 80 to the address of the hosting panel, but in the router the ability to connect only one address. In a word, a dark forest.
4. Let's say there is a server number 1, virtualization where billing + hosting, everything works. I want to add a server to transfer some account to another server, what should I do? I put OS + hosting panel on server #2, and add it as resources in billing on server #1?
5. Billing panel, as I understand it, is it desirable to bring it to a separate server? There is a weak server on which you can do this - will it pull? I mean, is there any load on billing? Or is there always a big load on the billing and on the hosting panel? It is not clear to me how traffic is chasing in LAN.
6. How to deal with local resources? Let's say there is a network drive in the LAN that is visible in the LAN with its own name. If I select any resource in a virtual machine, then it turns out that he sees it over the network, which is not buzzing - how to isolate virtual machines from local resources? If you give other subnets to virtual machines and hosting, then how are external white IP addresses forwarded?

Everything is clear with the hypervisor, I chose Proxmox. The rest I don’t even know that I didn’t come across in the network - sometimes it’s full of holes, sometimes it’s not clear with localization, sometimes billing doesn’t fit the hosting panel, etc. Point me in the right direction, comrades, I really want to touch my hosting with my hands, and the hardware is gathering dust and the server cabinet is dismantled waiting in the wings.

Answer 1

Billing is needed because there are a couple of people who ask to share resources - I want to have process automation so as not to think, not to guess and not to follow with a pen, notebook and calculator.

Why do you need billing if there are only 2 people and resources cost you almost free of charge ? 30 kopecks more or 30 kopecks less this month?
WHAT ARE YOU GOING TO CONSIDER THERE???
Agree on a fixed subscription fee - you will not lose anything at all, but save a lot of time searching for and setting up billing.
If you break them, they will leave you. Full-fledged hosting now costs from 150-200 rubles per month (I'm talking about VDS).
Do you apparently have an Ethernet cable at the input without any PPPoE authorization?
The router is not needed here.
Just plug the ISP cable into the hypervisor machine.
And distribute white addresses to virtual machines.
Am I right in thinking that inside the virtual machine you need a large disk that is stored on the storage system and, as it is used up, I increase its size and add disks to the storage system? Or you need to create only a system disk, and forward the folder (well, or via iSCSI) to the storage system in the hosting OS - where everything will go. Which option is better, more stable, scalable, more reliable?
It is unlikely that you have a cool storage system.
I would generally rely on the computer's local drive. This is more reliable than cheap storage (the one that is cheaper than 50,000 rubles without disks).
Do you have cloud storage?
So what kind of scalability are we talking about?
A separate storage system will make it easier to replace server hardware without transferring disks (data on disks). There is no longer any benefit from it, except for harm (an extra entity in the system is an extra point of failure).

Answer 2

A bad idea in general and will be an order of magnitude more expensive than the same DO. I'm talking about reliability.
Creating a normal hosting costs at least $100,000
PS and forget about free panels and billings, a notebook with a pen and those money are worth it!

Answer 3

there are also normal free hosts