So, Bestplaces.net wildly over estimated the rent in my area for Class B homes through Class D homes.

The last landlords probably let them run wild and now you have to train them to be good tenants and respect your property.

What in the wild west is a sandwich lease option?

Welcome aboard @Tanner Wild!

South Florida is the "Wild West of RE" (I should TM that term).

You may have a different mindset because you live in California but I would be very careful with that because the market can swing wildly either direction.

The problem is that without the listing pics you don’t know the condition of the properties, and the sf numbers can be wildly off (includes garages, porches, etc) which come from county websites.

Wild! 

They don't, the bottom line is there are several companies, and several scoring models that may be used, so you my see some fairly wild differences based on what score model your lender is using. 

Now, certainly, that does not mean it is the wild wild west when it comes to modifications, as I mentioned when a modification is entered into it is considered a new extension of credit and regulations will apply.