But they may want a large payout to buy it from them and it may need repairs that could need cash out of your pocket.

Welcome to Bigger Pockets!

Miami investor club they listed in events section here in bigger pockets. 

It’s all good now and this was just a question since it related to repairs but ended up being a seller credit instead of my coming out my pocket to do repairs.

Probably approaching $100k in total.My options seem to be sell and pay an additional ~70k out of pocket to the lender (underwater amount) or make the repairs and hope the problem is corrected once and for all.

They could also fix it on their own (as some of Scott's buyers do) , increase the value and sell it at higher price than bought, pocketing the difference. 

Could I get an 80% LTV Cash-Out Refi ($520K), pay off the $37OK, and pocket the difference ($150K)?

Cash out: $55,000All money out plus roughly $3,500 in pocket.... principal and interest $767/monthCash flow estimated at roughly: $200/monthMy plan would be to refi around year 4 or so before the adjustable rate kicks in.

You can learn more about that here on a Bigger Pocket Podcasts and here, and here is an article on it too.Much luck!

Of course you get the basics but if you want to full version of the tool it $50.00 bucks per mo. extra and you need to buy credits for things like skip tracing.To be honest I've learned so much more right here through Bigger Pockets, and I believe  you can find a mentor on here or someone that would be willing to help you out right here.