The year would be around 3,900 BBY (21,153 after the founding of the Republic), probably a little earlier. I have plenty of stuff on paper for the Mandalorians; I basically lifted a lot of it from the KOTOR games and wookiepedia regarding what armament and territory they have to start. Since I was looking to make it player driven I haven't really gone much beyond the set up for anything because I figured players would like some leeway with what they're and be able to inject their own plans into the progression of the game.