Thanks to both responses.
I think the $800 was for purchasing the Timbrens only? installation would be additional.
Wish I would have purchased the MH with them, especially for $1100. I paid almost that much just for the Sumos at e-Trailer, does not include installation.
So far have checked two local RV service places (near Salt Lake City)for install ability and cost, one was $600, another for $500. I don't think either one has ever installed these or Timbrens on a Motor Home before, not rocket science, just a lot of grunting under an RV. So I'm still looking.
May end up installing myself, with some help I hope.
Thanks again.