I was 355 when I started riding. I was going only 70 miles between wheel truing on my 700C fuji. I took a hard tail MTB and had wheels made on Velocity Chukkers, and they were the solution.
I'm down 30+ pounds but still am hard on wheels. On my MTB with the chukkers I have not needed truing but my cruiser bike goes about 100-150 between truings.
I do not ride hard or hit curbs, but I am lot of weight on 36 spokes.
You may be able to get a good bike shop to true that wheel, or he may need to get a stronger wheel made. That is a fact of being a clyde, that sometimes standard wheels will not cut it.
Ted