Fist(noun) the hand with the fingers doubled into the palm; the closed hand, especially as clinched tightly for the purpose of striking a blow. Fist(noun) the talons of a bird of prey. Fist(noun) the index mark [/], used to direct special attention to the passage which follows. Fist(verb) to strike with the fist.
A good used workover rig (single) including rig tank, rig pump, doghouse, and rig tongs can be had for around $1 Million. A good new work over rig (single) including all the aforementioned stuff is ~$3 Million. I don't know how much more a double or triple would be, but I'm guessing in that same ballpark. A new drilling rig is in the $10 Million range, although you can get used ones for far cheaper.
This will allow you to decide which RV provides you with the best value. The link to download a spreadsheet is at the end. The total cost of ownership of a 3 year old, used, RV is approximately half of the cost of owning a new RV. Most 3 year old RVs have a lot more value than half of the cost of a new RV. This argues that if one is concerned about ownership cost, you should seriously consider buying a previously loved RV. The total cost of ownership will be about half what driving off the lot in a new rig will cost.