I would really be worried about the quality of the beer that you would be pouring out of those lines. Unless you are going to go full glycol I wouldn't do it.Running the taps out to the side of the deck is easy. basic plumbing and insulating the lines / tower, etc.
Not sure about the solar.
I just see it being pours of foam. You would have to do tons of research before plumbing in your lines. Making sure you get the correct diameter houses and proper length. Also not to mention CO2 pressure to make the run you have to the taps. Draft systems aren't super easy there are some interesting dynamics to setting them up. Make sure you do tons of reading.