I've been looking at cash-out refi options to put that equity towards purchasing more investment property(ies). 

@Jo Bautista If what @Russell Brazil says is true, then midterm or longterm are your options, and in that case, I'd consider self-managing it. 

Another option you could explore is HELOC since you have equity.

What are the options for dividing the proceeds on the sale of a home where 2 owners are “joint tenants” on title (not tenants in common), and it was the primary residence for only one of them?

Looking at your current scores and income it would not be feasible to rent anywhere in Metro Atlanta or purchase so that option is off the table.

What are the options I have and any idea on rough cost estimates etc.

We've moved to updating our list of properties for a given state once a year and updating ownership data more regularly through Direct Skips Property Search option.

My tenants (less than 5 units) usually pay with a money order in person, but I'd like to have another option that also doesn't require a bank account. 

Looking for guidance from this amazing group:Opportunity to purchase a condo for a STR that will not quite break even from a cash flow metric (obviously depending on financing option), but I'm good with that.

Foothills area is a great option.