I don't have casters on my machine. I have it in my TV room. What I did do was go to an Auto store and buy an oil drip pan and I set it on the - I have had 2 leaks so far and the pan caught some of the fluid. As for the sink. The hose provided is pretty long. My bathroom is on the otherside of my TV room wall so I just ran it out the door. What will put you into shock is when your first delivery arrives - make sure you have plenty of storage room for all the stuff. I use Pureflow SAC's I get 3 treatments per SAC - 6 days. Beats hanging bags. Get a routine - and try to stick to it.
We do have a table and use it to setup the needles heprin etc. I also have a plastic set of 3 drawers we bought from WalMart - that has most of the other supplies I use - band aids - pads, needles- masks - gloves etc
Good Luck
Don