hard time getting motivated

ive had the duster up on jackstands for 3 weeks to pull tailshaft for a new bushing.at 54 im not to excited about rolling around on concrete,with two bad knees and a hip giving me problems,30 years of hvac has taken a toll on my body,anyone one else having a hard time getting motivated? i wish i would have put in a lift 25 years ago when i built my garage

I am feeling it also. 25 yrs military out in all kinds of weather will do it to you. I keep cursing the lift I need one badly!