In my former business (heavy truck shop mods/repairs/equipment)we did quite a bit of sandblasting and I always rented a mobile contstruction compressor and blasting equipment. It was a lot better and a lot less expensive than owning and maintaining a large enough blaster and my shop compressor was in use nearly all the time anyway. The media can be expensive depending on what you use but that is an expense regardless.
ps...Iron Clad, I use to make tanks and mounting parts like that.
