I think you can find one at a better price. Check the for sale forum here. This one is a MUCH better deal and it is South Carolina. I don't know where you are at so it is also hard to give you an idea of price.
http://www.kawasakininja1000.com/forum/sale/7105-almost-new-2014-ninja.html
The newer ones (2014+) can take the factory bags. Much better setup than the old system. The new bags aren't cheap but virtually invisible brackets when not on the bike. You also get traction control, 2 power modes, trip computer, better brakes, standard ABS, more midrange power, etc.
If I were in the market for a Ninja 1000, I would only consider 2014 or later. Too many improvement were made to consider the older ones. They weren't bad bikes but I would only consider one if a really great deal.
As for making it a better touring bike, or better in general, you might want to read my review here. I have a long commute, much longer than you typically will ride. It talks about my impressions and the mods I made to make it better for spending hours on the road.
http://www.kawasakininja1000.com/fo...a-1000-abs-after-24-hours-1400-mile-ride.html
The bike can be quite a good tourer with a few mods. The seat is one of the biggest weaknesses. Read my post and it will answer a lot of your questions I think. The Ninja 1000 (aka N1K) will easily do what you want and more. It does have some issues but they can easily and mostly cheaply addressed. Rarely will you ask for more power than the N1K can provide.