For commercial, I'd be sure that selling a single parcel fits within their larger portfolio.

Thats really is one of my concerns, which is buying a property and hiring a contractor to finish some work only for him to leave me with a larger bill or run away with the cash.

That statement is all about me, me, me.That's exactly what I mean when I say you're working hard to rationalize your own profit. 

Im new to larger apartments.

If they are just managing 1 SFH, then you may not need to check in as often, moreso on an as-needed basis or if you see something abnormal in your monthly statement.

Taking partial payments can lead to issues, and is usually a precursor to larger issues.

Evidence would be a lease in the tenant's name, a current utility bill in their name at another address, and/or a copy of a current bank statement with their alternative address on it. 

I am currently in the process of doing the same thing to another home on a larger scale to flip in the next 5 months and then we plan to move to Central Florida where I want to really dive into flipping.

Usually work with 1-4 unit properties so not sure what types of loans are used for larger properties.

I would make only one modification to his statement, it's not just business, it's every partnership.You need people who give a ****.