Been kinda off-site this week - and first, hoping that you can get that insurance approval and that it will help your pain - read your link about the procedure and sounds really good if it will help

Keep after your insurance company - you know what they say about the sqeaky wheel!
I'm saddened to hear about you thinking of moving though - I know you love your studio - would be very hard to give up... if the surgery worked would you be able to get to it? Is is very hard to find handicapped accesss! That is great if you do move if you can customize first - people dont realize how just one or two stairs can be impossible to navigate for some of us - and of course having wheelchair access around the home with lower counters, more accesssible shower, bath, etc. would great IF it comes to that....... I hope this works out for you......
AND, didnt even recognize you - you've had that avatar for years! But Cami is a doll!
Take care, sending lots of hugs....