I removed our debt (P&I) all other expenses have been factored.

A lot of factors go into this. 

I can't always be there for my projects, so as I'm trying to implement a system that allows me to always factor in a GC. 

Most of the designers I have have sort of a baseline price i.e $2.50/per foot but it can go up or down on other factors

If you're considering house hacking a multi family property, some lenders might be able to factor in potential rental income to help you qualify.

A purchase of $209k, $15k rehab, and ARV of $240k doesn't get you any thing back after you factor in all of the closing costs to purchase and to refinance.

While turnkey properties are more commonly used for DSCR loans due to their immediate cash flow, fixer-upper properties can still qualify depending on a few factors. 

The cash on cash number is what I liked about it and I think the Capex will not be a big factor because of the Tenants already are there and have been there and want to stay for long term so vacancy was set lower.

Your accountant should be able to factor that into your total cost. 

That depends on a lot of personal factors such as your finances.