Plugged new TT into 220v (wired wrong by electrician) HELP?!

It is possible that the 110 volt equipment is damaged, but to say, "Everything 110 needs to be replace, everything" as eHoefler said is incorrect. Start by testing the things easily tested, like the televisions. Plug them into a known good, working 110 volt source. Some equipment may have just a fuse that will need to be replaced, while others will need professional repair, or replacement. The insurer for the trailer should be contacted if the electrician refuses to accept responsibility.