if you rent a home or housesit for someone who has a large enough house - you've got a natural sound barrier. also, if the property has a lot of land - then you have even more.
one of my friends basically stayed in a home for free the entire summer (but i don't know if they already had a piano or what?) she took care of the grounds and probably mailed them their mail (important bills), etc. i always thought after that - wow, what a cheap way to enjoy your summer and help someone else out. of course, if you have a lot of stuff yourself , you mgith have to rent a storage facility (but those would be much less than rent wouldnt' they?) some people have a backhouse that they rent, too. suppose that backhouses are not advertised a lot - but some other friends of mine (between buying their own home) lived in a backhouse for the summer. it's tight - but you might also have someone who's living on a large property and wouldn't care about the noise (esp. if they work during the day). i'd look for a service arrangment where you offer to do some groundskeeping or whatever in exchange for a good price on the backhouse.
being a sort of private person - as a single i wouldn't care so much about entertaining at my home. probably just going out with friends. it might be hard in either of these situations to bring friends over. that is the element of trust that people look for when offerring these situations.