We have roofs rented out to them on several locations and I've negotiated many of the leases. Depending on the need for the specific location, what they are putting up there (how many antenna stations, gas generator, housed or non-housed unit, etc), the site can be as little as 18,000 a year to 40+K with escalations and a signing bonus. It's a broad range so you'd have to do a little homework and negotiate the best deal possible from there.