I would suggest your focus is all wrong. Bigger turkeys???? what does that have to do with what turkey hunting is about. A 16lb gobbler with 1.5 inch hooks is more impressive to me than a 27lb 2 yr old but really even spurs aren't the issue either.

If you're going to "sell" your services (you said guided) then what you're selling is an experience. The value is not the weight of the birds for goodness sake.

I had a buddy book a "guide" in a new state he was hunting. That meant he was walked to a ground blind and told to sit there until a turkey walked by. BRUTAL! Even if some 30 lb, 2 inch spurred, 12 inch bearded monster walked in he would of been very dissapointed with the hunt.

Figure out what value you really have to offer before taking people's money.