I suppose that depends on how much of the project is fully funded. Cost of living in Oklahoma for a year is just under $40k. If people have work from anywhere jobs and can find enough housing (because the increased demand will drive up prices).
The best way to do it is to have everyone pay their own way. Create a foundation to provide relocation services, help find the real estate, help them find work from anywhere jobs, etc. You could probably get atared for a few hundred million dollars.