There are lots more that require a little bit of human interaction and a few more that need full involvement of a person - answering the phone, some AR and AP.

You can also look at Airbnb using "the enemy method" to see what competitors are doing nearby that was coined by the brilliant Avery Carl.

Depending on the ARV, I think you are better of using your own cash or getting a partner involved to finish the rehab and then cash out refinance with a conventional or DSCR loan.

My question is since a lender is involved and I will be drafting up a contract how do I protect myself as to once I hand off the home he doesn't end up pushing me out (there is no sign of such and there is trust but this business)?

Too many people involved to do a relatively simple transaction.

Self-managing can be a great way to stay directly involved, but it’s also important to consider the demands it can place on your time, resources, and expertise.I'm certain, you have experienced some real frustrations with that PM company, but a strong property management company that can align with your overall needs, can sometimes be a priceless investment when it comes to staying compliant. 

Understand the fees involved and calculate the total cost for an entire year of management so you can compare the different managers.

Handy work is not my strong suit so I'm a bit uncomfortable with that part of the method at the moment.

If looking to scale flips and create systems around it to minimize your time and involvement, I'd highly recommend putting a team in place that can handle the day to day operations. 

This crude method ignores all the other debt payments tenants have.