Maybe he'll offer to eat the markup or something.  

Rents will decline, but you gotta take the good with the bad - here in areas like Summerville and Chs. we have been seeing significant increases in rent, and we've been eating that up for 8 years now.

This strategy allows for "infinite" ROI because now, you have no money in the property but it is automatically giving you cashflow; assuming the higher mortgage payments do not eat into your income too much.This is a very basic example and does not cover all the bases, but does give some insight into the power of BRRRR investing.

.: cable TV, going out to eat (a huge one for us), needless driving; being more deliberate, and the like). 

Most likely damage would be- urinating on carpets, eating drywall, scratching up floors, messing up the yard (if applicable). 

There are a few things to consider about possible lender adjustments, but normally they worry about all other issues and you would get the cake and eat it too following that approach.I am doing that with one of my properties right now.

Many people say, as an aspiring investor, to stay away from properties that have an HOA, as it would eat into the possible profits/cash flow that I could possible bring in.

Not everything is about making a profit, I'd just eat it on this one and know you did the right thing for a family that is struggling. 

Land is a high stakes game and the big fish eat the little fish.

I don't expect this anecdote to resonate with anyone who hasn't dealt with NoVA traffic or seen the Eastern panhandle of WV, but I'll eat the commute for less people and a nicer home.