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.
Being able to haul less weight isnt always a bad thing, it means less wear and tear on your equipment. The cost to operate are alot less. Big rigs get 4 to 5 mpg on average, a hotshot rig and can 10 to 14 mpg depending on the load. Tires for big rigs are close to $500 brand new, tires for hotshots are about $150. The cost savings is what makes the hotshot operation more profitable.