Static IP address per wifi connection? Configuration in router doesn't seem to take, am I doing it wrong?
The airport settings go by location, not which of the possible SSID you join, so make a home (or Jensen) location and use manual IP or DHCP with manual address to get things going. 

Check your firewall as it can block DHCP responses, but I'd guess the router has issues before the Mac, but something is broken for it not to just work.