Carefully consider the types of solar panels you plan on having installed. Long ago, if you didn't have enough roof space, you'd need very expensive high efficiency mono-crystalline panels. There are now more advanced polycrystalline panels and even thin film panels. If you've got enough roof space, you might wish to look at the size of the panels in relation to their output capacity to avoid having insufficient panels that you need more of later.
Are you building a home or moving to a remote location? If so, then you might want to seriously consider using solar energy to power your place. Getting the local energy company to come out to you might be expensive or impossible, so using renewable solar energy is a great way to ensure you will have all the energy you need.
When you are figuring out the return on your solar power investment, do not forget that you can sell back energy to your utility company if you generate a surplus. This is usually in the form of a credit on your utility bills. Even though the initial investment may be hefty, the long-term financial benefits is there for the taking.