I paid $750 to have my entire 55 blasted on my site. I think I paid half that to have my 40 mobile blasted, but it was a twofer deal with another body.
I did the inside of the LV and the entire SWB with a pressure pot from HF. Cost including the blaster was probably $300. You need a big compressor. I used a 15 CFM dual stage 160g tank for the SWB and it took a lot of fiddling. The LV had a 95 CFM 100% duty cycle that blasted like a dream. Nasty, nasty work, but cheap.
Take your glass out of the doors. It doesn't seem to matter how good you mask them.