Buying servers to run nodes in my house vs. VPS? Cost-benefit analysis?

The requirements of the software are on https://support.gala.com/hc/en-us/articles/22440775168283-Gala-Node-Software-Requirements

"supports Windows Desktop, Mac, and Linux (64-bit required) that has not hit end-of-life (operating systems that are still getting supported by their developers)”
4 GB RAM
2 CPU Cores
60 GB Disk Space
An x86/X64 Processor

I require this setup to run 24 hours a day.

1. What would be the cheapest setup for this that would has a good price-to-power ratio?
2. How would I calculate how much energy I would be using a month?
3. Obviously a function of time, but should I look into getting my own setup at home versus using the VPS’es? I have a setup of two nodes, which cost $40 a month. Currently, the nodes make a profit of $50 a day. How long would it take around to break even? Of course, there are other advantages to having a VPS too, since I am a digital nomad.
4. If I did have these home servers, are there other hidden advantages I’m not thinking of too? How hard would it be to route overseas traffic through one of the servers? Any other things I should look into?