Sam.. I don't like that idea even a little bit. The buses are used year round because of summer routes. The shop is never any less busy, so for us to take time when we could be doing other things to add upgrades to buses is very generous, and we should be paid. I'm not even making any of the labor fee on this one, but I don't think its right. It's the least the owner could do considering they get their fuel free from Arrow. PERSONAL means YOU pay for it. You own part of it, therefor you pay for part of it.
Check the P bus maintenance thread.