Sue, thanks so much for that information on the gypsum! It is often recommended here for our hard soil, but we have used it and I can't say that it made any positive difference.
Frilly, my heart goes out to you...
I know the scourge that Bermuda Grass is. We had it at our last house. It was a constant battle to keep it out of my few planting beds.
Kid, I'd say that you have been blessed, to have a son with such horticultural interests. (Though I can see both sides of the "too much time on the computer".... it was the same with our DD (largely because DH is heavily into computer gaming and she joined him), but she turned out pretty well and computer skills are pretty much a necessity in this world. ) But hybridizing does require a lot of computer time to keep up with things (note taking and tracking the seedlings, researching for new parents, processing digital images). Gone are the days of paper notebooks! (And 160 acres? I'm jealous... or would be, except for the Bermuda grass.)