I complicated it because theres stuff I use for motorcycles that I use for other stuff....
For example....the wheel bearing grease I use happens to exactly meet the Specifications called for by Cessna for lubing flap motor drive threads.....
Is it Motorcycle or Cessna?
I use it for both......
Shop is the same way.....
Welding equipment? Gets used for lots of stuff.
Air compressor, beadblast cabinet, hand tools, even the motorcycle lift get used for all sorts of stuff.
If it were a question of Gearhead hobby expenditures I could ball park it....