In Indiana if you allow hunting but do not collect a fee the property owner cannot be held liable should there be any kind of accident. There are different laws when there is a fee involved. You may check with the county extension office for this info or contact the DNR. Too much pressure can drive the birds off onto another property so you may not want to book solid but let the turkeys rest a few days between hunts. I would look at this long term and offer quality hunts where the hunters will be wanting to book next year before their hunt is over. You don't want bad reports so go for quality not quantity.
This forum should be a good place to get the ball rolling.
Welcome and good luck in your endeavor.
Steve, I love "smoked" turkey