I know silicon isn't limited, but it would have to be more prioritized than it is currently towards solar panel production. Motherboards might move one day to synthetic diamond, which would be interesting as far as heat and using ridiculous clock speeds. That would free up some silicon related production companies most likely to move towards solar panel production. It isn't about limitation of the resource, but the priority towards manufacturing due to demand. There is more demand currently involved in motherboards, than solar panels as far as the world is concerned.
I rent currently, and they don't even like satellite dishes on the roof here. My parents are selling their house, so they wouldn't add it right now. Houses go up in value, solar panels do not, which is bad. Losing investments are crap. If it only lasts 25 years and finally pays off after 15, then that is a 10 year window to make up for the depreciation in value.
Most rental properties aren't going to invest in solar power due to the expense, the tenants are charged by the electric authority which makes money off of power consumption. It is in their interest to not promote solar power on houses, as they would rather make more money by the customer using more energy.