With BRRRR numbers a bit harder these days, it seems that would be a decent option to explore for total ROI and CoC return if you aren’t planning to take on more than 1 project at a time. 

They aren't hard to clean.

@Johnna Dean how do you know the responders are:1) Qualified to answer2) Aren't trying to rip you off?

Even if you aren't renovating all that is required to pass a lead test is cleanliness.

The paper you sign will not be enforceable since you aren't holding a deposit.

As for snow removal and mowing, our transition months where the grass is dormant, and we aren't getting any snow is fairly substantial (spring and fall).

We have 3 kids so we need a private space with at least 3 bedrooms but we aren't afraid of getting creative and converting other spaces with untapped potential.

I was thinking that the apartments aren't targeting tenants with local jobs, but NYC commuters since the ride from Watsessing to Penn Station is ~30 minutes during work hours.  

Aren't there other alternatives to solve your sister's 250K debt problem? 

There are programs like Avail and Stessa that do this and aren't too expensive. 3) It's tempting to just use a spreadsheet when you have one property but before you know it you have several and it's a pain to switch over to an actual system.