If you are handy, save your money. I kinda enjoy fixing stuff and there is nothing complicated on these things. Yea a holding tank is a PITA to fix, but not hard. Plus your repair would probably be a better fix than just replacing the tank, as a example.
The China board in the frig, the Service Contract will want to go back with a factory board. You would replace it with a Dinosaur board.
The pump motor, It is probably a standard motor but when you buy it thru Lippert, you double the price. Again probably a made in China part.
2012 Ram Laramie 3500 DRW 4x4 3.73 Tow Max Pkg B&W Companion 60 gal RDS aux fuel tank. 2014 Montana 3150RL, 2 A/C's, Leather, 6 Point Jacks, Splendede WD2100XC, Mor/ryde X-Factor, Duravis 250 tires with TST 507RV monitors. 2 x Honda EU2000's