He is right, I20 is the boat for you...problem is there is no racing in Oregon for that boat (except 2 handicap races).
If you go with Tiger (one design Hobie racing), you will have to use Hobie one design sails (correct me if I am wrong). If you look at F18, you can order sail to more match your weight (although you are still too heavy to seriously compete). You could race MOST races in So Cal, ? in No Cal, and SOME races in NW as a F18. More boat options open up to you if you go F18.
If you daughter can skipper, you could double your pleasure-double your fun by going 2 "A" cats. Great racing in So Cal (Long Beach), No Cal (Santa Cruz), and Pacific Northwest. Avoid all the political BS as to what races you can attend with which F18 boat.