The most important tool on the farm is a grease gun Oyvind, it virtually eliminates most any other additional maintenance
Half my equipment is a few yrs old, the other half 20 some yrs old & primarily operated by me alone - never abused.
Other than my combine that goes to town for a yearly post harvest check up, I do my own wrenching/service/welding on machinery.
Good - experienced help is hard to come by nowadays. I do the majority of the farm work by myself... everybody wants big $$/hr wage, but won't do any heavy labor or long hrs when needed. I don't have time to babysit & train somebody new every yr, nor can I afford to let just any idiot try to operate a half million dollar piece of equipment applying $100+/ac ag products... 6 more yrs after this one & then it's FREEDOM 55