Hello, We've had a Chevy Express van for the past 5 years and it was recently totalled. There is a 2012 NV SL 3500 that is within our price range and I really like it. A definite step up. We live in the Phoenix area in Arizona. We have 7 kids (ages 1-14) and we tow a large pop-up trailer. Anything I should be looking out for (besides the dealer trying to attached a million fees)?