[FHA might put a 90 day restriction to sell to an FHA buyer but a conventional buyer is ok.]

So properties have different underwriting models based on credit tenant type, stnl or mtnl, how many primary years left on the lease, lease staggering, termination clauses, co-tenancy clauses, restrictive use clauses, lease guarantees for personal and corporate, disclosure of ongoing sales, association by laws, etc. 

Also anything else I need to know about floodways aside from the construction restrictions?

This "extra" money can, of course, be saved up and used to bolster your down payment without restriction.

I especially like the places where the authorities actually encourage Airbnbs rather than discouraging them like in most places in North America.Medellin is a great place to invest but there are restrictions on Airbnbs.

Many lenders have 3-5% conventional loan programs that have lower fees than FHA and if your offer/terms are the same agents prefer conventional over FHA due to their being less restrictions such as the 90 day flip rule etc.

If their is an HOA read their covenants and restrictions to make sure their is no problems with the HOA that could give you trouble later.

You can't implement an elaborate renovation and expect a large "above comparable" sale price2) HOA Rules - Homeowner associations have rules that might restrict how you use and lease the property.

In terms of buying out your position, legally, there are restrictions depending on which registration process was used. 

There are no prepayment penalties and no restrictions on what you can do with the proceeds of the 401k loan.