I agree with The Piper, you ned to prioritize your desires. If you cut too much weight, you wil suffer with durability. If you are 220, that's pretty good weight for trying to lighten up a rim set. I'mt 180 lb, and I'm not a fan of going too light. On the positive side, I know that the inexpensive purchased wheels are usually using super heavy rims and heavy spokes when you get into the coaster brake wheels, probably due to liability. You may want to focus on going with a lighter tire, tubeless, and maybe using a lighter rim. But get with a builder and talk it over. Most of the locak guys that build up wheels in my area have tried most things and know what works.

good luck!