Use a DD-WRT'ed router as a bridge to connect through mobile hotspot on a cell phone for a few minutes to set up? When I saw this thread I thought it was a vacation home, where that would be the only option...
My Place: Premiere XL4 Lifetime 3/26/13 XFinity
3 TiVo Mini's on MoCA
Formerly Win MCE 3TB Ceton4 XFinity
Parents: XFinity Motorola AnyRoom DVR
80 HR Series 2 Lifetime 4/11/04 DEAD as of 11/2010