Ah... I get ya..
Well.... You get what you pay for in detailing,you can get the car looking better in half a day as the paint could be filled with glaze and sealed.
It wouldnt last of course...
You can go the whole hog and have the car wet flatted to get rid of orange peel,scratches and all marks..Usually costing between £700-£1000 but can take a couple of weeks..Some of the costs are the products used and whether you wanted it sealing with a wax,sealer or some of the new nanocoat tech..
Better to get a figure in your head of what you think you want to pay and say how good will it look for £xxx ?
Matt wont fill you with cr@p to get the work,he is honest and will tell you the score..