Get a bunch of all metal jerry cans with a screw cap , and make a drive into PA or NY once in a blue moon to fill them up. Ethanol free gas lasts a long time when stored properly.
https://www.jegs.com/i/JEGS+Performance+Products/555/80235/10002/-1?srsltid=AfmBOooEVJB45FIAkQOQlN2kqUz-dz-2MB3SxNX0kJBi_bCul-XL5BslM5g
You can buy a bare threaded barrel from almost any online retailer, no problem. Just make sure whatever muzzle device you buy separately is compliant, and have it permanently attached, ie pinned and welded. You could also forego a muzzle device altogether and get a non threaded barrel, or get a threaded barrel and install a simple thread/muzzle protector.