* 7 inch clear plastic dome $10
* seedling heating mat, should be about the same size as the bottom of the dome. $20
* X-acto knife w/blades set, (straight razor even better) $10
* qt. of rubbing alcohol, $2
* 4-oz. jar of cloning gel, I use "Root-Tech". $25
* stack of small Styrofoam cups, $2.
That's about all the hardware you need to set up a cloning operation. If just starting I would get 2 domes and mats. Gives you more options as you experiment and learn.
Good luck, BigSteve.