Hi, we are considering buying an RV, and of course, something to pull it. We have 5 kiddos, and Grandpa may come along as well. We'd like to do this as reasonably frugally as possible, although, we know this cost money. How old a trailer would you recomend? Can we get away with an old 1970's trailer, which we can get cheap, and just add AC? I think we can get away with a 22 ft trailer, of some of us use a tent. Or are we going to need to buy something more like only 20 years old? How much can we expect to have to pay? Also, what do you recomend for pulling? We're thinking Suburban? Thoughts, pretty new to this, have owned a trailer, but it was parked for business, so I never had to worry about the actual moving parts before.