Ram3500 venting!?

its a fact we buy the dodge diesel truck foer the cummins diesel!!!!
at 100,000 the wheel bearings had not been ever packed. all highway miles. mechanic said all dodge trucks of that vintage the front wheel bearings went south at 100,000 just like clockwork. but still I have had little issues with this truck.
at 120,000 the fuel shut off solenoid went out, called dodge dealer, new one was like $475. best they could do. no aftermarket. called cummins place off internet in mobile ala. sent me one for $100. ( then again it is a $25 solenoid!????)
had a 92 3500 diesel, had the 5 speed Getrag. it went soutt in about '98 with like 200,000 mi. dodge dealer installed rebuilt one for bout $1200 back then.
if something major went wrong like injection system, I would have to take out mortgage to pay for it. yes really.....