Rent a kimsufi server for one month at least this cheap one for $6 + $11-20 one-time activation and test it. Depending on where you are closer to, choose France or Canada.
Do a test to see if 100Mb/s in this location is something that will suit you ping / speed.
After that, it is a matter of choosing the HDD and CPU / RAM to suit your needs.
Generally, no matter what company you choose, renting bare metal will probably be a better solution for you than your own server in colocation. And better than most VPS where price / performance and metal sharing are not optimal.
Remember that the price of collocation does not always include electricity and uplink. Some DCs count these costs separately from the cost of rack space.
When you sum up the cost of buying the server and HDD plus a few spare ones and add the cost of collocation and electricity / uplink where the prices are not “soho”, it may turn out that it will not come out cheaply per year.
As I mentioned before … You have to go to the data center and install the server, then you have to go to DC if something stops working in the server or pay for remote hands, provided that DC has such an offer.
And what in 2/4 years, when the equipment is old, will not be a problem for you? What about a HDD that may refuse to go to work one day? It’s all on your mind, both in terms of finance and logistics.
Add that specific location. Where would you like to have this server … close to your location? At the end of the country? Maybe a different continent? If you absolutely want DC, you have to check what is available in your area, but it may turn out that the nearest location may be quite a bit away from you.
So in conclusion, I’m not sure if it’s worth the effort for one server that would act as a home NAS or something like that. Rather, it will be art for art.
A more convenient solution is to rent bare metal, definitely not VPS or some cheap clouds …
Server crashes are not your problem, but the rental company, and in the future as the equipment becomes old and there is a new offer, you can quickly change the server.
Speaking of kimsufi, I have personally used them many times over the years and still have a few machines from them. It’s an OVH sub brand. You get what you pay, which is the minimum, but they are usually ok.
Alternatively, buy some Odroid HC2 and a large HDDs and place them with family / friends …