How to create a home server?

Question

ubuntu

I set myself such a task - to create a home server to raise a virtual machine on it with android (which will display an image on a TV and be used as a media player) and ubuntu to deploy a web server. I want to collect all this in a small, passive, slightly consumed case. What to use? There are options:
1) Buy a motherboard with a celeron n3050 / j1900 processor and put it in a case
2) I have a pentium g4400 desktop, I can buy a mini itx mother and case. But it confuses that it consumes 65 watts. There is an idea to downlock to 35 watts (as on 4400t), but I'm not sure if it will work
3) Buy a ready-made nettop, I found it on Avito on i5-3337u
The main question in the choice of components comes from whether it will pull ubuntu + android, on which I will watch iptv and twitch in fullhd? It seems to me that the first point is not suitable for this.

Answer 1

2) it is correct to say "the processor consumes UP TO 65 W" and it heats up like hell at the same time :).
if there is no load, the percent consumes crumbs in units of watts and does not heat up at all.
everything else is to your liking, there is money and a desire - buy it, but you can make a quite excellent machine from an old stump.
see the processing power of the processors in the corresponding tests.
I would advise you to install an android and give it a video card with a TV set, because it needs it directly and with a minimum number of intermediate spacers.
and put a web server inside the android, there were such applications - wrappers over Apache or nginix, well, or put an application with a Linux axis and deploy the web in it or something like that, there are a lot of options