There are a ton of logistical issue with putting on these shoots.
1. Virtually all land in Texas is private and anything central Texas is many thousands per acre at a minimum. To host a machinegun shoot where people are bringing M2s to shoot at large metal object (like cars) where the ricochets can go a mile or more downrange you need a massive amount land. Shooting into the air at RC planes requires not only a huge amount of land but also a very special type of geography (like Wikieup) to do safely. Not many folks are willing to take on the risk associated with an event like this vs. the liability and risk to their land.
2. Insurance has got to be massive. Especially with the more recent stories of folks getting shot or killed at these types of events. Be it a kid shooting himself in the head with a mini-uzi or the shoot here in Texas where a guy got shot by another attendee walking his 1919 from his truck and not realizing a round was still in the feed mech. There was a guy and a kid killed a couple weeks back by tank when the breach failed during a shoot/demo.
3. There is probably little to no money to be made. A lot of folks will bring $100K worth of guns out and burn through a couple thousand in ammo in the course of an afternoon but will balk at a $250 price of entry line spot. Even if you got 100 people to show up at $250 each that's only $25,000 in revenue. Back out insurance, targets, facility/land rental, etc. I think you would be lucky to just break even.
The best chance in my opinion for a large publically accessible machinegun shoot to be held in central Texas would probably be to try and work something out with Tiger Valley, if they would be willing to be a venue for another shoot.
It's been awhile so my memory may be fuzzy but I believe the previous Tiger Valley shoot fizzled out because the guy/s putting it on got tired of doing it after a couple of years, not for lack of interest. Dragging out cars, targets, binary, etc. and then cleaning up the mess afterward probably gets old real quick. However, at least Tiger Valley is an existing large range facility in centex with Waco nearby to provide for lodging, food, used cars/appliances, etc.
If somebody wanted to put on something out in far west Texas there is always the Lajitas resort out by Big Bend. They have a shooting/range facility onsite and seem to be perennially on the verge of bankruptcy so may be happy to entertain any new ideas for additional sources of revenue and clientel to stay there.
That said, I don't know how many takers you would get for a shoot in far west Texas when many of the folks who collect machineguns in central Texas (and who want to go to larger organized shoots) already go to either the Leona and/or YO shoots already.