Its not so much the equipment, its the expertise you get at vet hospital. I'd be furious and upset too!
It's the expertise with the specialist vets dealing with their speciality day in day out. I look at it like my local vets (no matter what equipment they have) being like gp's and the referral vet bring like a hospital specialist.
It very much sounds like your vet has either run out of ideas or not interested so at this point I would consider being referred for a second, specialist opinion if further investigation and an answer is the way you want to go