Yea, removing a rifle barrel is a rare event. In 40 years I've needed to remove just one - the one on my Ruger 77/22 when I put a match barrel on it.
I have 10k plus though my 15-22 and have yet to need to clean the barrel under the hand guard. When I do, I'll just put a 20-gauge mop on a cleaning rod and run it under the guard. Then again, I don't crawl in the mud with mine.
I understand the apartment bit, but my small compressor is one of the most useful cleaning tools I have to clean pistol and rifle actions. Yea, canned air is too expensive and they don't have enough pressure to do anything much. Personally, I think you are looking for a complicated solution to a minor problem.
BTW, welcome to 15-22 crowd! We are a opinionated bunch (and never hesitate to express one!) but there a lot of good information and support here. Welcome Aboard!