Theres already quite a few NV/thermal rental places on the internet. Price varies on the equipment you rent.
ThermalVisionRentals.com - Thermal Vision Rentals is in DFW. Theres another one but I dont recall their name off the top of my head.
And they ship them to your house, once the rental time is over you ship them back....Theres already quite a few NV/thermal rental places on the internet.