Bump and several cuts

Update: I proceeded with betadine soaks and neosporin, the cuts got better and worse and better and worse. Never quite healing. He stopped eating, and visibly lost weight. He had his first ever bad shed, then another while I was waiting for my vet appointment at a new vet who was booked for almost a month out.
New vet still says the cuts aren't scale rot and seem to be healed, though scarred. Nothing in his tank could cause it since I have removed everything and even replaced his water bowl with a smooth bowl. He only had paper towel bedding and still got them.
Vet has said the scales and bad shed are not problematic, but he has a heart murmur and a tumor in his abdomen. I'm waiting for a quote, so I'm not sure what the cost will be. I will try heart meds (I need to give orally) and we will have an ultrasound and biopsy. I'm not sure about moving forward with surgery on the tumor.

Has anyone gone through with surgery for a tumor and/or put their snake on heart meds?