I've had a Craftsman "5-hp" and "7.1 CFM @ 90 psi" 20 gallon compressor for almost 20 years. I put ratings in quotes, because I know it's complete BS that it is 5-hp or delivers 7.1 CFM. I think the "claims" posted on compressors have gotten a bit more honest in recent years, but overall I still think they are totally bogus. The tools also lie, add at least 2 CFM for any sander or paint spray gun as to what it will really consume in actual use.

So...get as much as you can afford, and are willing to deal with in terms of rewiring your house demands. For me, I wasn't staying in my present location for much longer, so I bought a second mediocre compressor that also lied about its output. I have one running on one breaker in the house and the other one running on another breaker. They both feed air into the same line with a 3-way splitter that harbor freight sells. From there the line goes coalescing filter, and then a 1-gallon desiccant dryer and then there is a 10 gallon piggy back tank (only want clean dry air going to that tank because there is no drain on it). I keep the regulators on both compressors set so they never deliver more than 125 psi, which is the "limit" of the piggy back tank. The system is 1/2 lines until the last ceiling mounted hose real which is 3/8 and 50 feet, and has a total tank capacity of 60-gallons.

Overall, it works pretty well, painting isn't an issue, DA sander is my biggest consumer, and if you keep going with it the compressor will keep running too, and sometimes they both kick in. The newer compressor has a tank limit of 155 psi on it's 30-gallon tank, so it tends to run much more, as it kicks in at 110 psi, and the old Crafstman doesn't kick in until 100 psi, and it kicks off at 125 psi. Is it ideal? Nope, but it gets me by as a hobby level user.

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1983 W123 300TD US spec Turbo engine, with Euro bumpers and manual climate control, and manual transmission.