They handle payments, payoffs, and year-end tax information. 

Mike,I handled similar situations. 

When you close on the replacement property, the funds go from the 1031 exchange agent to the escrow company handling the closing.

@Chris Seveney i spoke to them today and was told they are not the proper dept to handle this type issue.

Despite my consistent asking and unsurprisingly, they haven't given me the number for the office that actually handles these proposals.

Challenges?

I'm going through the FHA process because this is a loan assumption and able to get a very favorable rate.I'm wondering if anyone has gone through this process being a pure real estate investor (no W2 or other income) and how they would handle this situation.

While you will learn how to handle those peaks and troughs your employees want to get paid on time every week, no exceptions. 

This allows someone to handle a flip on their schedule (nights, weekends, spare minutes...).

Then typically there is someone on the backend who handles financials and whenever the exit is and how that would work.