I have a small leak and losing freon because the a/c hose is vibrating and is so close to compressor pulley that it has rubbed a small hole in the rubber part of the ac hose..help

I bought the vehicle brand new in 2009 and for 5 years, never had any issues with vehicle just normal wear and tear. It's got 83k miles; AND it's paid off. It gets regular service: oil, fluids, tires, alignment etc either by dealer or lube 'n oil place...by all standards, a great and reliable vehicle. Last year had brakes installed all around, at the tune of $835, AND 4 new tires and alignment done. A short time later, I started hearing what sounded like a soft "wobble" when I drove on the highway. I do not remember ever hitting speed bumps hard, or hitting ghastly potholes at 65mph, so it's not that. I took to a mechanic. They put it on the alignment rack, came back that the rear end (drivers side) wheel was out of alignment by about 26* . They informed me that there is NO rear end alignment or shims available for my model 2009 SCION Xb...and told me to keep an eye on tire pressure, and rotate tires often and should be ok. 7 months later brings me to today. The 'wobble' sound got WORSE, much WORSE. I do not notice any unusual vibration, just the "wobble" sound and its very loud. Is it possible the rear end was damaged during installation of 4 new brakes. AND is this a fairly common issue with this model of SCION Xb? Oh, and what options do i have? (obviously pay the $2000 + repair bill for a brand new rear end, trade it in on another vehicle taking on debt with the big banks, lease, buy new used vehicle that will cost less to maintain than the cost of the vehicle) As you can read, I'm terrible frustrated and don't have $2000+ just laying around! Your thoughts, recommendations, and suggestions are welcome. Thank you for your consideration. ~~yirons