Thanks for the suggestions. Looks like $10 is average, especially since he has no experience driving a tractor, track loader, etc. We still have a ton of limbs/debris from the tornado but hubby has been essentially sidelined since Dec and while I'm pretty scrappy, there is a limit to what I can do myself. Or want to! Cattle are relatively easy in the summer, I can take care of them, but moving corrals, etc takes two people. Fixing fence, two barns need repairs, general maintenance, painting, even yard work. But as a bonus, he can fish all he wants - off the clock :)
I got suckered into taking over my brothers summer mowing job when I was 14 but I made a whopping $10 per yard. Totally not worth it!