It’s on the market, they just had an offer on the table but buyers backed out after a 4 point inspection.

You certainly could offer $65k, but the seller would have to bring about $10k to the closing table to settle the mortgage. 

Both of us are satisfied with our arrangement since I can bring those skills to the table that they don't have.

This means that you will have to come to the table with some of your own cash, as well as float the first construction draw.Now, given this, why would anyone not use leverage? 

Throwing a win win situation to the table, what if we meet for a beer I share all I have learned and you tell me the secret spots to visit in the island?

You have money left over in case something else comes up and if you paid cash, I'm going to guess you still have a healthy cash flow after your expenses making it is a great return on your initial investment of $50K.Option 3 would be off the table as I don't think things will change that much in 3 weeks.

@Matt OberskiAlso to more directly answer your original question Always have more settings than possible guests. 6 table settings for 4 people.

But after my agent and I started to review what I need to bring to the table, it appears I need another $5k for closing costs, inspection, etc.

With the first route, you will have to bring something to the table if it is not the bulk of the capital.

The biggest complaint you might hear is that you overpay for a turn key and leave equity on the table.