Man didn't want to have to go that route. can't be too cheap
Look around. There are ways to scan things yourself with stuff you have on hand.
With a few measurements and lots of ass pain, you can pull it off if you really want to. Not everything needs to be scanned, anyway; just the applicable areas.
Likewise if most of what you might intend to mount hits mounting areas that can be measured and drawn out. Just a few points recorded in any 3D graph are all you need for many things.
Obviously nobody
really wants to do that, but if you just hit a brick wall, it's possible.
If you can find a contract video game or general 3D modeler that's nearby (difficult, likely) on some of those middleman sites (Fiverr is an example), they may have the skill-set to scan or interpret already; and they aren't expensive. I don't bother with drafting everything now; I just go find those guys and have them make things 3D for me. Again, it's all measurement intensive unless they're nearby or know how to interpret your photography for 3D scans.
Is this stuff unrealistic for most people? Yup. Would I do it? Nope. I don't know how bad you want that scan, though.