Obliquely subject-related...
We just bought 16" SUV (not RV) tires. Sam's Club was a dollar or two less per tire than Tire Rack online. Again I pay shipping then cart them to somebody to install, pay them to install, and cart the mounted tires home, I'm better off with Sam's $15/tire mount/balance/rotate/road hazard.
If you haven't ordered, I'd suggest you try Discount/America's price match offer.
Or, if you're feeling tough, there's HF's backyard tire changer:
3.5 Stars out of 5 on 68 reviews.
HF also offers a Static (not spinning) Balancer.
What are you doing for Valve Stems? Suggest you install custom ones from Borg (Dually Valve from
Your Tire Shop Supply
Chuck Carvitto claims to have made the original custom valves shown at
Tire-Man.
I'm not showing Chuck's kit because page I found showed only a wheel with stainless simulator and a valve poking out at the six and twelve o'clock positions. The two kits are essentially the same, and the time to install them is when you're mounting tires.
EDIT: Seems the website with Borg Dually Valves (yourtireshopsupply) is down. The link worked when I did this post but now I can't even go to their homepage. Chuck's page includes Install Instructions, so if you wanted to see what a custom kit looks like, you should be able to see it there.
