I'd say you've accomplished the goal of doing the most with the least with your current model.Having said that, you'd have to be a complete idiot to pay $1M+ for a mobile home and some wood pallet sheds.

Based in Philadelphia, my goal is to start wholesaling properties as well as buy properties to flip and hold.

If my goal is turnkey/buy and hold properties, should CoC really matter?

It really depends what your goals with REI are.

By "business account," I’m referring to setting up an LLC as well as a business bank account.My goal is to expand my real estate portfolio by acquiring approximately two properties per year.

At the end of the day, if you have a tenant you want to keep, talk with the tenant and see if you can get on the same page with them to align your goals as an investor with their goals and budget for their housing. 

So I’m trying to see if I take that equity off the table and re-invest the sale proceeds in another market across more doors where we’ll see better appreciation, OR if we continue keeping it as a rental and work on principal pay down even though the rental price has been coming down and the home is not the easiest to fill because of the above average price for the C- to B neighborhood.Ultimately, my stated goal has been to build appreciation (over cash flow) by acquiring 1-4 doors per year for the next 10 years to allow my wife to retire (or be work optional) by the time she's 50.

(at least for the first few properties) I do not need cash flow in the short run but my ultimate goal would be to retire early from my investment properties.

DSCR loans are based off of down payment, credit score and either actual or market rents so it helps to supercharge an investor's real estate goals and net worth.

I agree with the notion that one needs to define his or her goal with regard to real estate and making a living of real estate alone would require lots of it, but cash flow for the long run is almost inevitable.