It isn't the money. Shoot, we spent $10K on one of her dogs and it only lasted a year and a half.
She really is fine with the money part. Plus, it has been a while since I lost money on one. I keep track now!
It is the time and shop mess and having 'ugly' bikes sitting around. At least until I get them painted! Mostly it is the time spent working on them. She probably gets tired of hearing about all the broken and crappy parts I feel the need to repair also. Since she saw 'her' bike and her 'track' bike go together and helped with them a bit she understands a little more how it all works. I think part of it is I put all the work in on them and then sell. Usually within a year of them being finished, but some are quicker. She will probably have 'her' bikes for many years. I think that is why she claimed a few, to keep me from selling them off! I would have too!
We had a horse some years back that finally died (30+ years old) but we both liked having him around. Really nice horse too.