Some of our club members are in their mid-70s, and it’s impressive how (and what) they ride. Lots of endurance bikes offer light weight, comfort through improved dynamic shock absorption, and wider tires (32 mm) which work well on rough roads. Sorry, I’m firmly in the club that if you use it, cost should not be a guilt factor in your pursuit of a fine bicycle. There’s lots of choice out there, and you deserve a splurge.