One site two services. Is it worth it to start?

Question

Search Engine Optimization

There are two services / products that I wanted to promote on one site, namely the supply of raw materials and the supply of equipment on which these raw materials are converted into the final product.
That. I wanted to capture the following groups of customers (according to the degree of desirability):
1. Buyers of raw materials;
2. Buyers of "equipment" on lease and raw materials (together they would have come out cheaper);
3. Buyers of equipment on lease (for those who, for some reason, would not want to buy raw materials on the site, but with an eye to the fact that this client will still be interested in raw materials and then possibly return).
The buyer is a wholesaler who constantly needs both products (relatively speaking). The main goal is still the supply of raw materials, but often this group of customers is immediately looking for the appropriate equipment / spare parts.
Does it make sense to start this from the point of view of the complexity of promotion?
Is it justified to promote for two key queries leading to the main page of the site? For example: "wholesale supplies of raw materials" and "supplies of equipment on lease".
The description will contain: "Supply of raw materials and purchase of equipment on lease."
Or, in such cases, do you need to create a separate site for raw materials and a separate one for equipment? (I would very much like to avoid this, because finances are very tight).

Answer 1

yes, whatever you like, start from the needs of customers - promotion will come by itself

Answer 2

It is necessary to see specific keys, or at least the subject, otherwise it is not clear what it is about. No one will give you good advice.
In practice, it often turns out that it is cheaper to promote two narrowly-themed sites than one about everything.