Help for Smudge

Hey guys, I'm re doing this because some circumstances have changed. We had to take our beloved cat Smudge into emergency the other night due to a really bad urinary blockage with urinary crystals. As some of you may know that can be quickly fatal to a male cat. We had been informed about a grade 4 heart murmur as well, but that seemed to improve thankfully. We got to take him home today Feb. 5th with being told he had greatly improved but is still now showing signs of not being perfectly ok. I know 2500 is a lot but medical bills can be very tough. Even if you can help out a little we would greatly appreciate it, trying to help our Smudge get better . He's more than just a pet cat to us