Is 8 - 10 years unreasonable? Assuming you went straight into flying you must be early 20s at worst. That's wide body command in your 30s and then another 30 years flying LHS? A bit of extra life experience can often help with Command.
Honestly, 8 -10 years experience in commercial aviation before command sounds entirely reasonable, you have a (hopefully) long career ahead of you - what's the rush? Charter SH airlines only do 2 sector days as well. If the lifestyle works for your personal life and you can put bread on the table and buy the occasional beer, I would just try and enjoy the ride.