Wow, thanks for all the ideas. To answer some questions:
1. The Maxx bass: https://sportfishdirect.com/pre-order-florida-titan-maxx-1-2/
2. My pond builder said he needed to see how much good soil we had to see how deep the pond can be. He knows we want it as deep as possible.
3. There is a pond stocking place 15mi away so getting the fish is trivial. Except I'd have to bring in Florida LMB hybrids, they don't carry those: https://greenwaterfishfarm.com/home.htm
4. Big bass? Heck anything over 3 lbs would be great.
5. There are two small (1/5ac) ponds that have been there for ten years or so. One doesn't seem to have any fish. So in April I stocked it with 2lb of FHM and 100 BG minnows. Will stock again next Spring. Then in the fall intro some small bass. It's my let's see what happens pond. The other pond is adjacent to where the new pond will be built. Ten years ago or so my BIL stocked both ponds with BG and LMB from the local source. And never did anything after that. I was the 1st person to fish it in April. I caught small BG with every cast of a small grasshopper lure. I also caught six or so LMB in the 3/4lb to 2lb range. In August I fished with bigger lures and quickly caught a 2lb and 3lb LMB. Smaller lures caught several in the 1/2lb to 1lb range. Pretty amazing as no one has done anything with the pond in 10 years. I guess you just get lucky sometimes.
6. The pond will get little fishing pressure. Right now two people have fished those ponds minimally. I expect the same for the new pond.
7. Bradford averages 38in of rain per year.
OK, that's it for now. Thanks again for all your great input.