Some states do require a fluoroscopy tech so you need to check with your state health department on this. If you are indeed a PGYII, there is still plenty of time before you open an office, and if you don't have pain training already, I would strongly suggest a pain fellowship.
All fluoroscopes effectively operate the same way but there are some significant differences in scatter radiation amount (older machines are one phase rather than the current 3 phase...this causes the machines to "search" for the correct image brightness and contrast and will add several seconds radiation onto the beginning of each patient). There are ease of use issues, portability issues, and different degrees of rotation over the top of the table...limitation of the latter requires either reversing the patient position on the table or flipping the fluoroscope C upside down. Costs vary from $2500 on ebay to $250,000 for the OEC9900 with motorized 3 D C-arm rotational controls. If you are starting out without a client base, buy a cheap c-arm then trade it in or sell it once you develop a practice, otherwise you are purchasing a little used but very expensive instrument for your office early on.
