My question would then be how and who would I hire to manage the rehab process physically?

When your virtually evaluating properties with the sellers over the phone, how are you then physically evaluating the properties?

The last time I had an LLC formed here the attorney that formed it was even wanting to put my physical residence on file for the world to see and I ask him to change it to the PO Box and have the registered agent to be him. 

Run the numbers every day as if  you’re exercising.  

The advantage of "rent to own" is that typically you're selling them an option to buy the property that they can choose to exercise or not.

It's 2021 and I feel that physically collecting a check is outdated and a waste of time and energy.

Certain parts of your system might be things that it would never occur to anyone to do if they didn't start out from the perspective of managing from afar - for example, a house cleaner will usually be happy to do a "deep clean" twice a year and do an inspection at the same time so you can stay in control of the physical condition of the unit.

I'm currently living in the Northeast, but as an independent contractor I'm able to work remotely or schedule physical meetings with ample time to jump on a plane if necessary.

This exercise may enlighten you (and if you want to post your result, I would be interested but I am confident it will be over $1k/month because we buy semi regular, including some poorly timed such as 2004, and they have all appreciated over $1K/month (I believe our worse is $1.6k/month over the hold period)).  

The estimate is just that; nothing beats having someone physically looking at your home.