-he pays $550 of the $930 mortgage, and half of the utilities, which are not split, and are in my name. am I overreacting, or do I need to do some damage control on the tax front?

If not, contact her and let her know you need it in writing, keys returned and also check she's paid up on her utilities. 

Somewhat expensive and we have had a couple of persistent thieves still break in, it is rare.3) Turn Off Utilities to deter squatters.

Also another reason people can need to pivot from utilizing conventional loans is their DTI gets capped or they are self employed and thus despite having ample liquidity to conduct the transaction they’d trying to do, can’t document income to the lender’s standards.  

Based on my understanding of the Customer functionality in Quickbooks, I agree that for real estate investors who might want a more cost effective option can utilize the Customer features (available in the Simple Start and Essentials version) instead of classes.

Example:House rents for $1,500 a month and utilities cost $150 a month.

So she will not have to pay any rent and just utilities for the year.

Second, as you mentioned, I would see if the utilities support the conversion. 

I figured the only holding costs will be the utilities. 

My ultimate goal is utilize the BRRRR strategy in acquiring a property in Philly, this would be a out of state venture for me.