Need RI Advice ASAP

[Minkness]

So, I very much believe my ball python has an RI. He squeeks, rasps, and gurgles when breathing. I WILL be taking him to a vet, but I have some questions to make sure I take him to a good one.

After lots of reading on here about RIs, I understand that there are 2 types. Viral and Bacterial. What are the specific tests I should ask to have done?

Now, I have been calling EVERY reptile vet in town to get the visit fee, and ask what tests they perform for an RI. This is very confusing to me as one place it's only a 30$ visit and another, it's as much as 99$! No one will tell me what a test or treatment 'might' cost. (I explain I just need a ball park estimate so I know what I'm in for and can transfer $ if I need to). On top of that, most if the more expensive places say they only do a physical, and the place that's 30$ is the only one to do blood work. (But they haven't gotten back to me on cost of blood work). When I explained to one place (a middle priced one ) that I was looking to make sure I knew if it was bacterial or viral. The answer I got was basically this "We treat for viral because the only way to test for bacterial is an autopsy" .....then this person went on to tell me that if I had any other snakes that I should bring them in and get them treated as well.....seriously?

Please help me...I'm really lost on what to do and know I have to do something.