Likely your best solution is to do a 1031 exchange. 

I'm thinking that repairing the plumbing leaks and getting the soil dried out could be a permanent solution.   

From what I’ve read in the Wall Street Journal, companies like ALE Solutions specialize in placing displaced families.. so you might want to explore partnering with them.

I'm sure that factored in to the government trying to find a way to gain ownership of the land and the only solution appeared to be a land swap. 

Just pointing out all the negatives with no solutions comes across as “i’m a complainer”

While it’s not uncommon for full-service managers, you might find lower rates (~10-15%) or alternative solutions like co-hosting services, especially if you handle bookings, rate adjustments, or guest communication yourself.

Your solution is to borrow the downpayment, as well.This is referred to as "over-leveraging" and it's not wise.

The solution was to suggest they renew for 9 months.

His solution was to wrap this loan straight into a loan I already had with him.

Assuming these are in decent areas, this is the best solution.