For 42 acres you are right about possibly getting crowded. You would need to operate like Big Creek down at Uwharrie.
Scott Fields, may he Rest In Peace, ran that with the help of volunteers and some other groups. He would hold rides that would be on certain dates and reserved ahead of time.
Example: in January he would hold an “Ice Breaker” ride, and a Valentines weekend ride in February and a few other rides when the park wasn’t rented out for a private ride or in use for training.
He’d open up 25-30 spots, and people would pay their fee on PayPal and sign in that morning. People would break into groups of 12-15 rigs each and each group had a lead person that knew the property well and coordinated with the other group leader as to not get jammed up. We’d wheel one side of the park with one group on the other side, and switch a little later.
You could let some local clubs rent the park for a day or weekend for a flat rate. Something like $300 or something for the whole club. If it’s mostly mild, you may even get some of these Facebook Jeep clubs that mostly just meet in parking lots and restaurants to come out
You also need to figure out insurance, liability waiver forms, and most importantly erosion control. You may get by for a while with just a handshake and a $20 bill for a day of wheeling but if you start having the creeks get muddied up too much and it gets noticed someones gonna come looking to hand out some fines. They may give you the option to fix the erosion and set up sediment ponds and you continue, which will cost a boat load, or they shut you down entirely. It’s best to control it before they even notice by using proper water diversion and some simple straw bales and gravel. This takes money and time as well.
Trust me I’m in no way trying to discourage you, just give you some pointers on what this takes. I’ve dreamed of running my own park since I was a kid. I just don’t have the money/time/equipment/trust-fund/parents money/insert other unforeseen need/ ability to do it.
If you want to get serious about this, I highly suggest you call Skip who is the owner of Gulches Off Road park in Laurens, SC. Tell him what you want to do and that you’d like to ride down and see his park and discuss what it will take.
I had an in depth discussion with him years ago and I won’t share his financial situation, but I will say at that time he was making no money and he has had several battles with the county.
Some people get mad at him but he is doing what best when he does this, but there are many times he has to close the park due to rain because of run off from the park into the river.
Skip is a nice guy and if you plan a time for discussion when he has time, I think he’d be willing to point you in the right direction.