I think I can help you a bit here. My son has this exact RV and pulls it with his 2011 GMC 1500 with the 5.3 engine. It tows like a dream and he does, of course, use a good WDH. This is his second mini lite as his first one was a 18' model. He bought both units new and has never returned to the dealership for any repairs of any kind. He is totally satisfied with his Rockwood and will buy another one in the future.
We have been camping for over 30 years in everything from a popup to (3) 40' diesel pushers. We now own a Wildcat MAXX, 33' travel trailer we pull with a Ram hemi 1500 and it pulls fine.
Hope this provides some helpful info, we understand your excitement about getting your own rv, you'll never be sorry you did!!! Good luck.
Days camping (2015)----88 days
Days camping (2016) ---110 days
2016 Wildcat MAXX 28RKX (33' TT), 2007 13' Scamp
2015 Ram Laramie Hemi
30 years RV'ing
12 different RV's