My daughter had her last ablation done at Emory. The insurance paid all that they were supposed to pay, but she still had a huge bill because the insurance is not very good. She had the procedure. After the fact, she contacted the hospital and told them that the bill produced a real hardship on her. They sent her forms to fill out. They forgave all of the bill that the insurance didn't pay.
If you go to an electrophysiologist, he may can help you get set up to do it without you having to pay everything. They already make a king's ransom off of the insurance company. They might do it anyway.
Just so you'll know, beta blockers often cause depression. If you feel terribly discouraged, keep in mind that it might be the drugs. Eventually you will be able to get the procedure, get off the drugs, and the depressive side effects will be gone.