Dont for god sake search around for the cheapest quote!
Go see peoples work, see what they can knock out, and if you cant afford it then wait.
Also, how much prep you do yourself? No offence to anyone, but this is asking for trouble, as if it comes out not to the standards of the other cars, this can be put down to you. I would take it in a complete car, and let them do it all from stage 1.
This is coming from what i have had done myself.
I paid £1200 for wings, bonnet, grill, doors, door shuts, rear quarters etc with a few scratches and small dents etc, and also wrotten sills that were cut out and welded up then painted.
This DIDNT include having the bumpers done, the boot or the roof, and obviously not the inside of the car either, purely as i wanted some other stuff done to the boot and bumpers, and the roof really was fine as is.
Hope that helps

And it came out perfect, as i shopped around first.