Thanks everyone. 10 days in and AC seems to still be working, so hopefully it'll get me through the summer and if having an AC leak can't cause any permanent damage to the car, I can just deal w/no AC for the rest of the year. Really July and Aug are the worst months, everything else I can do windows. I understand that the amazon bought refrigerant and leak kits are cheap and can potentially gunk stuff up, but my car isn't worth $2100 at this point as it's a 2004 Corolla w/174k miles, so my plan has been to just do normal maintenance and if anything bad happens above the value, I'll just donate it and buy another used car or maybe an older Nissan Leaf or something. Thanks for the all the advice!