You want to make sure you're really a good host site in terms of solar resource. What does that mean? It means south facing, no shading, a solid roof structure, ready access to the site, and a strong utility interconnection potential (i.e., close to a substation or other existing electrical infrastructure in the right utility territory).
Others could also play host, like a closed landfill, or a brownfield. Ideally you do not want to take up "green space" or prime agricultural land that could have a higher value used elsewhere.
Another consideration to keep in mind: a 1 MW project can require an area with either 3-8 acres of land or 100,000 sq feet of roof space (ideally a new roof).
You also need to make sure you're in it for the long haul. If you want to lease your roof space to a project, you'll need to do that for 25 years at minimum, and be an entity that will be around for 25 years to stick to the agreement.