I recently paid about $400 to have a hood, front fenders (2), aprons (2), bib, bezel, window frame, and front doors media blasted. It was done with garnet.
I was quoted $250 to do a frame by the same business.
I would expect it to be $1000 to $1500 to have everything done.
I'm sure prices will vary. If you do have it done, make sure the person doing it is experienced in auto body blasting or you may end up with distorted parts that could be very hard or impossible to fix. This is especially true of the fenders, doors, hood, and any other larger panels.
depends on its condition.. my body had a lot of bondo etc and i wanted to see exactly what i was dealing with... took the guy awhile.. and was exactly what atlas had said it would cost in another thread
$1100
PS I had him use glass.. it came out nice with no warpage.
EDIT: this included everything, except front fenders and doors, stripped down in pieces with no rubber etc. (hood, bib, aprons, windshield frame, hinges, tub)
mine cost 600 to do the frame, axles, and tub @ 130 an hr , but too him about 6-7 hrs and quoted me 600, did it with regular silica sand, no walnut shells or soda, no panels were warped, there is already a thread going https://forum.ih8mud.com/40-55-series-tech/292308-sandblast.html
Akies sandblasting in North Salem Oregon did my fenders, hood, aprons, seat frames, gas tank cover, heater housing, and rear seat frames for $80.00 Great deal in my book. (regular sand)
By the time you spend $1000-$1500 blasting it, and buying new rear quarters for $300, and paying the fab guy to redo your body mounts and other unknown rust areas you could buy a complete aluminum 3/4 tub and never worry about rust again. I assume your cowl is in good shape and could be reused, but buying the aluminum tub would save you a lot of headaches and possibly money. Plus living on the beach is going to cause you rust problems in another 15-20 years, but we all know aluminum won't. Just throwing that out there. I remember a guy selling a tub a while back, but I think John in Columbia grabbed it up.
PS- You can borrow my sand blaster for the rest of the small parts if you want. i.e fenders cowl, doors, etc., or you could have those pieces acid dipped to get into ever crook and cranny.
abd it cost me about $300. I used filtered beach sand from the Oregon coast.
I built the blaster out of two 5 gal buckets, and used a media blaster tip i bought second hand from a shop sale.
i set up my shop with plastic, and swept the residual out the door and showeled it up and screened/filtered it again and reused.
there were several hard spots, especially where PO had used bondo. the project was frame off, so i did everthing.
worked good for me and i have the equipment left over to use again.
my 10 HP 50 gal compressor could go for about 20 minutes and then needed a break. i added two 20 gal portables to the line, and then i had no porblem with extended blasting.
I don't blame you. If you do decide to replace your quarters there are some really nice extra thick replacements that will protect it from body damage in case you still wheel it after you restore it. They are made by Budbuilt and cost the same as the thin ones CCOT sells. If anything it will be harder to rust again since they are thicker.
I might would try to do some of it yourself and send it out for the final blast/prep. I would strip everything off of it and leave it on the frame and use aircraft stripper to eat all the paint off. Then I would "go to town" with some wire wheels and a grinder. You would be surprised how quick they will strip metal, bondo, etc. Then remove it and send it out for a blast.