To answer the first question, not really. Unless you have your EPA cert., a reclaimer, refrigeration scales, a gauge set, vacuum pump, brazing tools/supplies, a cylinder of R-22, and a little bit of know how your going to have to pay somebody with all of those things to do it. There is a considerable amount of time, skill, and equipment involved in swapping out a compressor and you're going to have to pay for it. The reason nobody wants to replace the compressor is not because they don't want to mess with R-22, it is because it is a repair that doesn't typically make sense. There's too much labor involved to replace a part on a 10+ year old system that will likely encounter more problems not so far down the road. FWIW, if you find someone to do the compressor replacement, you'll be looking at a bare minimum of a $1000 and quite likely somewhere between $1200 and $1800, maybe more. If a new system can be had for $3000 (which I doubt) that would be the way to go. $5000 sounds a little closer to reality.