I installed an AGS from Magnum Energy on my Allure. I believe I paid right at $300 for the gizmo. It was not hard to install. The most difficult part was locating wires that connect to the generator start switch. The Magnum unit does interface directly with my Magnum Energy inverter remote panel so not sure it will work easily unless you have a ME inverter/charger.
Xantrex also has an AGS module if you have their inverter/charger. If you have the Silverleaf system on your coach, they also told me they can do generator auto start if you buy and install their gizmo that works with your existing Silverleaf system.
'07 Country Coach Allure 470 Siskiyou Summit #31578, Cummins ISL 425; 2014 Ford F150 toad; Air Force One Toad Brake.
Glen Allen, VA; Smith Mountain Lake, VA.