I had a Ready Brute Elite system installed for my 2008 27' Born Free and 2007 Chevy HHR. Works well and certainly within the budget.
This could be a DIY project, but the HHR is so low to the ground, it needs to be lifted to run the cable from the front to the brake pedal.
I used Elkhart Collision and Service in Elkhart IN. to do the install. They have a large operation and service many high end Class A coaches.
Good experience.
2011 Winnebago Sightseer 33C
2007 HHR Toad with ReadyBrute Elite towbar and brake