You will have to pay around five thousand dollars for the solar heating system that you choose. Think how fast you'll make that money back by all of your savings from a lowered power bill. Solar panels can be installed gradually.
Solar panels are not very easy to install, so you should hire a professional to get the job done. While you will save a bit of money by trying to do it in your own, you do not want things to be less than perfect. Also, you will most likely end up paying someone to come out and fix the mess you made.
If you know nothing about installing the equipment needed for solar energy, contact a professional to do it for you. The installation of solar energy panels and equipment is something rather specialized. If you attempt to install it yourself and do not do it right, you can ruin the equipment involved.