You don't need any real estate aside from your own roof access. That covers 40% of population in my home country (Poland). Also, the financing is so easy that

You don't need any real estate aside from your own roof access. That covers 40% of population in my home country (Poland). Also, the financing is so easy that you don't need access to much capital even - if you live in a single family house and you can afford electricity then you can afford solar.