Hello,
I’m sorry to hear about your cat. I’m also sorry everything in vetmed is so expensive right now. It sounds like your vet has done what I would do for my clients and that the next step is a CT scan. You can certainly see if another vet will look for a polyp for you, but you may be back where you are now if that isn’t productive.
There are also CT scans available outside a referral hospital for a lower price (I don’t know if this is the case in your area), but the dilemma there is that this will only help diagnose. You may still need that IM vet to help with the treatment plan.
I hope things work out for your cat.
Dr Magnifico
I start a work up for a cough with trying to decide if this is a respiratory issue (ie the lungs/trachea part of the body reposition breathing) or a cardiac problem (heart). An examination is key to this. After that I talk about an Xray or blood work. I wish I could help more than this but I think it’s time for a second opinion and diagnostics.