BR i can see some issues with your design and position of TDC when firing happens. With everything being at opposing positions you will just end up with a pile of bits as it locks up upon detonation. I would look at a more traditional layout of the crankshaft myself? As for tools a Mill and a lathe is must for what you are doing. Buy the biggest you can get away with on your pocket and space. Allow plenty of time to learn the basics to save hundreds of hours screwing it up. Expect to spend more money on the consumables, hand tools and measuring devices than the machines.

The original question you asked is quite wide so list out:

1. what do you want to achieve (be completely honest)
2. what kit and tools do you already have?
3. what space do you have?
4. do you want buy or build?
5. estimate the time you want to complete your goals (then double it)

If you can come back with some of these answers people here maybe able to answer your questions. High IQ or not please ask the stupid questions or you will not get correct answers.

This hobby is very expensive so spend as much time reading where people have gone wrong before instead of looking at what looks shiny. Read lots and lots, read again and once you have done that go back and read it again.

"Children that run before they walk miss out on the detail they would have seen if they had crawled first" - My mothers words to my kids

Don't be afraid to experiment as long as you expect failure and can afford it. Failing can teach more than paying for training in some cases.