I am not an attorney but I have studied this a bit so take it all for what it is worth.

I'm about to have to pay an additional $300 per LLC to my attorney who is my registered agent for my LLCs.

She's probably using one floating around the office, one you provided, or one she bought from an attorney that's full of legal jargon and missing important clauses.

If you know local wholesalers or off-market specialists, their contracts have usually been vetted by an attorney.

I recommend you do a google search for "real estate seller financing" and educate yourself through some blogs, then have a conversation to see if the two of you can agree on terms that work for everyone.Be sure to use an attorney to draft the documents, not the same one the seller uses.

Am I required to hire an attorney to write up the contract and assist with the closing?

@Chris Brown, Georgia is an attorney state.

You may want to get an attorney and hope RTR doesn't sue you.There are numerous posts here on BP with warnings about buying turnkey because you pay top dollar.

Condos are starting to get condemned, which means people are having to vacate units.I'm telling you right now, I'm a JD (not a practicing attorney) in Florida whose business is being an insurance expert for carriers, working with engineers. 

That's held in escrow, usually by an attorney.