Think I said somewhere the way to justify spending time and money on old motorbikes, as long as you enjoy the time, at least some of the time*, you end up owing the bike as the notional charge accrues for providing you with many hours of entertainment.I'm at 30+hrs plus on my bike, No regrets from me as I've done this before and know the costs. For me, its a hobby. Its the value of the accomplishment for me.
*I try and look at it that way even when I skin me knuckles . . .