Steve, you may have misinterpreted some of the things stated. You do not need to blast concrete, a strong detergent will suffice and an acid wash with diluted hydrochloric acid {also cheap, acid wash first then detergent}, repairing cracks is easy, there are epoxy bondo's on the market that are relatively cheap and are applied with a spatula, you paint straight over them, you can even add sand to mixed epoxy and use that as filler.. Paint is applied with a roller, not sprayed, no compressor needed. If the OP can supply a length and breadth measurement I can accurately tell how much product should be used, then a price can be worked out. I will also add that these products can be bought by anyone, and being an American company, should be cheaper in the USA. 10 litres would be enough to do a 2 car shop with 2 coats, 2nd coat can be applied after 4 hours.