I would recommend at least teaching through 1 cycle of the 4 seasons, or at the very least the seasons out where you live, where you have the most adverse weather. I'm sure that you can fly in 'clear and a million' weather like the rest of us, but flying in reduced vis, clouds, the mountains, is where you really hone your skills.

Like rick said, if we all had the same opportunity you have, I'm sure we would think twice about instructing over getting 121 T-prop time. Good luck with whatever choice it is that you make bud.

Lax

PS. If you decide to instruct, take the interview anyway. That way, you have a pretty good idea what one is like once you feel you are ready to start interviewing.