It's easy in today's market of crypto-millionaires and fast-action TV shows to feel like you're missing out on a craze, but the worst thing to do is get yourself into a property without knowing the numbers behind it, resulting in sleepless nights, unpaid mechanics liens and potential foreclosure due to hasty decision making. 

Either a civil engineer or a mechanical engineer , depending on your area 

I would be using the cash to BRRRR.What is the best mechanism for my friend to be able to invest with me given he would only be writing a check or two a year to me and then receiving interest checks? 

mechanic?

The lot is a beautiful corner lot, the outside of the house looks good, just some minor things, all the mechanicals are good.

Its a little like a mechanic, elelectrian, plumber.

Still need to check the condition of mechanicals and roof.   

He's a fellow mechanic in the neighborhood who has known my father for over 15 years. 

I have a contractor that does all scoped including (plumbing, mechanical, flooring, etc).

I am sure one I get the "Mechanics and processes"  down I will be ok.