Hi Lisa
Would you believe that I've had loads of experience with car showrooms
Firstly, never presume that you will be using a Clients equipment like you do/can with domestic cleaning. It is very RARE that you can do this.
Secondly, make sure that your insurance is well up to date. Smacking a new car with a buffing machine is NOT like knocking over a box of eggs in a supermarket. Damaged stock and no insurance could finish you. I would have a word with your insurers about this.
With regards to the quote, it's just like anything else apart from the fact that most car showrooms open seven days a week so enhanced payments are probably in order for a weekend (but I know a good way round this which keeps the cost down).
Look at the floor in the showroom. What colour is it? Car dealers are notorious for throwing orange salt down in the winter. When this walks into the showroom how easy will the floor be to keep clean?
Finally, do you want me to come and hold your hand? It's bound to be on my doorstep?
Just looked at the diary and I'm out cleaning a house full of carpets at Sutton Park, Shrewsbury on Wednesday. I can nip away for an hour or so if you need a hand.