Search Craigslist for a good used compressor. I had terrible luck with a 3hp Harbor Freight oilless compressor I bought to replace an old Craftsman 2hp belt driven compressor that had developed a rod knock. The reality was that the HF compressor was far noisier than the Craftsman and struggled to run air tools that the Craftsman ran with ease. I ended up giving the HF unit away. I found an old 5hp belt drive on Craigslist for $150. It's been wonderful. All it needed was a new belt. There are deals out there if you're patient and do a little searching.