We paid ours off when our balance was $125k, but on a 15 so payments were fairly high at $1732 PI.

Are you aiming to lower your monthly payment, shorten the loan term, or switch from an adjustable rate to a fixed rate?

House hacking is an excellent strategy, and just got a lot easier as conventional loans now allow 2-4 units with only a 5% down payment.

You then draw your HELOC balance as the down payment for the flip.  

Most of my travel nurse / medical professional bookings have come from Furnished Finder but the other sites usually appeal to other tenant types like digital nomads, relocating families, etc.  

Sue the seller, any payment delinquencies should have been disclosed.

Because if you make good money and always have a source of funds for emergencies then you can use the money immediately if you have enough for a down payment on another property or put it in a high yield savings account or treasuries for a low risk return with good liquidity.

Rocket Mortgage (my current lender) quoted me $100,000 for a 20-year loan at a 9% interest rate, resulting in a monthly payment of around $1,000.

(Tenants not paying on time, keeping track of payments ect..)There isn't just one problem.

Many late payments" is never grounds for eviction.