Part of her decision might depend on her need for extra income. 

In return they would ask me….”Well what if I did this to the house and that to the house (spending thousands of dollars in extra’s to the house), how much could I get in rent then”, and it never ceased to amaze me, how they looked at me when I told them that they would still get $750.00 a month.

For the most part this extra gain is realized for doing nothing more than just owning it overtime and no extra effort is required.  

Overlays are the extra rules that lenders put on top of the Fannie/Freddie guidelines. 

Tenants/roommates will be paying my mortgage and I will still have an extra $200 left over for other expenses.

I earned my supper.

In other words, will any of your assumptions not hold true as far as the extra income you might see? 

The contractor even agreed to take credit cards, which meant I would earn cash back, and I could build business credit with my Amex charge card.Then the first red flag came with the contractor.

I'm 55 and we're on track to buy a SFH every 2-3 years from the cashflow we're earning from our current portfolio. 

But at 75/25, it changes to 65/35, accounting for my extra money, but also his bonus percentage.