Plus, if you end up with teenagers, it would be nice to have them and their loud friends and music over the garage, too, lol.  

You dont want to turn the situation into one where others are moving out of an apartment because the new neighbor blasts music and parties 5 nights a week.  

Some people just don't want to be complainers, or they assume you know about the problem and choose not to do anything about it.I had a tenant who someone complained about for having friends over and they'd play acoustic music into the wee hours of the morning.  

Once we gave him notice, he started playing music loudly and just became a general pest.

Win-win.At any rate, if you have law students or med students or other grad students (preferably not theater or music majors - they're flaky party animals), see if there is an off-campus housing listing for their grad students, or go talk to them about how to advertise to their grad students.You have to be careful how you word advertising on Craigslist or anywhere, though.  

I had people calling me from bars with live music in the background, obviously inebriated, people who screamed obscenities at their kids while leaving me a message, on and on.  

Derek your neighbors can hear and feel your "thud thud thud rumble rumble" on top of their own music and through their earplugs and over and above an other ambient noise.

Also, is there a point where it's up to the tenants to solve their own problems and how do you draw that line--eg if there's noise or loud music in the neighborhood or other quality of life issues that don't apply to the physical integrity and function of the property.

Find any reason to turn away a music or theater major - drama!  

Consult an attorney and proceed with eviction and stop this musical roommate nonsense.