My most recent role paid around $140k between salary and bonus in Kentucky, which has a pretty low COL. 

I hadn't thought of that, and I wouldn't expect it, but it's a good point to note and perhaps worthy of adding a clause into the agreement/proposal regarding the investors' roles and abilities to influence decisions.

This person will be critical in helping you find the new listing quickly.Repeat this exercise 10 times or so without making an offer. 

He is on his 3rd PM in 2 years and about to fire this one.He is asking if I'd be interested in taking over PM role for the 3, and when he moves out it would be the 4 units. 

Even if you are planning on filling that role now I would encourage you and your attorney to do the diligence now on a successor trustee to take over when you no longer can or want to be trustee. 

I would agree that it is a big obstacle but debt to income plays a big role in brrrr growth.

Their only role will be to inspect the property for a fee.

What we do look at is how much rent we can get each month, how much of an option for the property we think we can get, how much money will be left in the property after we get a loan on it, how much cash flow we will get each month, and how much of a profit we will make when the tenant exercises the option.  

Do they reduce my role to crunching numbers, choosing designs, and hiring and communicating with the contractor and lender? 

I won't probably be playing the GC role on this one because I need it done properly.