If you keep driving up Hwy 133 to the Marble turnoff and onto Marble or over McClure pass, you’ll find yourself in Gunnison County. The county just completed an architectural survey of the historic town of Crystal, a place to which the road is quite treacherous and is only for hikers or ATVs.
Information you’ll need to build in the unincorporated parts of Gunnison county can be found here.
The Gunnison Valley Regional Housing Authority has a fascinating website on deed restricted housing opportunities here.
I would definitely read the housing needs assessment and housing plan to find the best opportunities to build in Gunnison county.