I would do some online research into Realtors in your area to see if you can make a connection.As @Michael Dumler pointed out, wholesalers are going to be a more reliable source for consistent off-market properties with margin.

Discount Property Wholesalers, Real Property Network, and Coast 2 Coast House Buyers just to name a few.They can be a reliable source for off-market deals here in the Portland Oregon market.

At the time I was active enough that I had a few sources of reliable money.

My questions are:1  - How do you find a reliable corporate cash buyer to work with?

For the eviction day, you will need someone extremely reliable to be on site.

He needs to transfer these amounts at closing because your new tenants will ask for them if and when they vacate

If Florida recognizes Transfer On Death dees (TODs) subject A could fill one out naming subject B to avoid having to go through probate.

Since your rental is currently held in your personal names, transferring it to an LLC before selling could complicate the exchange.

Generally, you can get a card that offers 0% for transfers. 

IF you can't find information for your local area from a reliable source (ie government) that you are comfortable following, hire an attorney who does evictions.