so I am in San antonio visiting for the next 2 weeks, is their any good shops or must sees while I am here?
Don't know much about models, but you'll want to get over to the "Sunset Station" as that is the restored SP depot on the main line. Good spot for railfanning, and they have a restored SP 2-8-2 on the site as well. http://www.sunset-station.com/venues/thedepot/tour.html
Go have a drink in the bar of the Menger Hotel. Still has bullet holes in the wall from none other than good ole TR himself, Theodore Roosevelt...
I have visited here about 6 times while passing through, nice selection. http://www.lonestartrains.com and of course go down to the Riverwalk, Alamo.