I use one of the two mobile mechanics in my area that both used to work for Iron Technics, our local supplier of forestry equipment. Gary has a fully equipped truck, and also a boom truck if he has to lift something...;like the chipper disc when it went bad..... $60 man hour, and he has extensive experience with just about all the forestry equipment that folks run out here.
The other day, my brake system developed a noise, on the way to the day's job, which was within 3 miles of Gary's home. I left him a message, hoping he'd still be at home (he doesn't work out of a shop, only mobile). !0 minutes after I got to the job, there he was. Fixed the problem in 10 minutes, as he had the needed part! Awesome service!