This is what I'd suggest. The wiring needs to be fixed, and you can handle that. Sounds like the coolant hoses are gone, and that's a simple fix, even if it might take a bit of work.
As for the valves and shims, feel free to take it to a mechanic once the other problems are solved. Some people prefer riding to mechanic duties, some vice versa, and some a combo. If you prefer just riding, let a mechanic take care of the more complex tasks required to keep it running well.