I'm guessing the contractors who've looked at are thinking that your project is one that is likely to leave a dissatisfied customer, no matter what. Most guys (myself included) try to avoid work that's not likely to satisfy the customer, because we've learned that no matter how many times the customer says, "I know this won't be perfect" . . . they don't mean it in the end.

My remaining local service customer is a 200,000 gallon pool set on the bank of the Tennessee river, with a 4 ft thick layer of plastic (think: thick toothpaste) soil starting about 12 feet down. The engineer did have a soil test down, when the pool was built (~1992) but chose to ignore it. As a result, the SS gutter system is nearly useless, because the pool sags 2 1/2" from the SE corner to the NW corner. About 3 years ago, I finally convinced the GM and board that they HAD to do something because it was STILL settling. They spent about $40,000 stabilizing the pool.

But re-leveling it? Not practical.

They're talking about a $1 - 2 million redo in a couple of years: if it's ever fixed, that will be when.

In your case, the only practical solution I can think of would be to lower the skimmer, using a fiberglass or SS plate to fill the enlarged cutout, and to mount the skimmer.

I'll ask Waterbear and Waste to take a look, however.