Depends on the vet. Find a good vet and that wont happen. I take my reptiles into my vet and if she thinks they look fine, she just sends me home. I thought Harley my beardie had another RI as she is prone to getting sick but when i took her in, my vet told me she might have a very mild RI if anything at all and to just take her home, raise her temps and watch her. If it got worse, she would do a culture and put her on the correct meds. Not all vets are bloodsuckers. Thats why you find a good one as they are as valuable as gold.

I mean you could bump the temps up a few degrees and raise the humidity for a week or so and see if the wheezing goes away but honestly unless your snake has a piece of shed stuck in its nostril or is going into shed, it shouldnt be wheezing if its just in its cage. My retic will huff sometimes when he is out and overly active which is normal for retics but once he is in his cage and relaxed, he is quiet as a church mouse.