Happy Holidays!
Here's an option:You can build a gravel wheelset with light(~300g) carbon XC 29er rims.Better hookless if you plan to stay below 4bar/60psi.As long as you use any 700c tires compatible with hookless rims( mainly not Continental that for obscure reasons say no ).My 3y old wheelset has the Novatec 411/412 hubs, and SAPIM CX-ray.For a very reasonable price you get a ~1100g wheelset.Maxxis Rambler and Ravager tires are great on them.