Find someone at the local airport that owns a twin and offer to pay for gas if you can fly with them. That way you won't have to pay for insurance, hangar, mx, etc., and you won't have to deal with the headaches and stress of a/c ownership. I hooked up with a 135 operation and rode along on part 135 flights, and they let my fly the part 91 legs. Even though I could only log the part 91 legs, I got some free time in Barons, Queen Airs, and a King Air (all PIC). Lots of 135 guys would be happy to have some company and an extra set of eyes in the plane, as long as their OpSpecs allow it.