May be a bit challenging, but I'll never tell any body what they can or can't do...you just need to think first drive second.
As for off road shops there's just jeeps, rock spyder 4X4,and Saangs fab. I had a small mechanic shop in King City do mine...but the YJ's easy.
check out jeepkings.ca, those are the local guys that will really be a help.
You're never to old to have toys!
'90 YJ, 4" RC Suspension lift, 1" Shackle lift, SYE and CV, Holley Carb, 33/12.50/15 Dynapro M/T's