Excessive marketing should kill the marketer however they wouldnt do it unless it worked...

Maybe things get better in a few (or five or ten) years and you can sell without taking the loss.Perhaps you could convince the bank to reduce the principle on the loan and in exchange you take a personal long from them for all or part of the difference.If you're just trying to eliminate the excessive debt over the value, you're going to take some pain and your uncle may end up having to move.

At 25 Im just about to buy my 3rd property as a part of a buy and hold with the excess cash flow paying for the downpayment of the next property once my reserves get up to a certain point.

At the end they ask for en excessive amount of money ($20k) and supposedly they show you how to do it.

It’s estimated that the American investing public lost in excess of $600 Billion investing in Initial Coin Offerings, of which it was found that 84% were outright scams, and 92% were structured so that it was impossible for the purchasers of these “coins” to make any money.

I call them back and say don't you think a whole sale slip profit for 90k Is excessive.. he stumble bumbles and can't really answer..

As @Natalie Kolodij mentions, there are special rules for "self-rentals", an example is that you cannot deduct rental expenses in excess of your rental income. 

California charges a minimum tax of $800 a year per LLC, and more if you have gross receipts in excess of $250k. 

Examples would include excess assets you can collateralize, another property you can pledge etc.  

Let them know you intend to hold them liable for the lawn damage and excess utility use.