Mr.Heater probably makes one of the best heaters and the big buddy would be the choice for a family tent.Zodi heaters claim to be the safest being outside the tent.Here is a good tent heater comparison
I would go for Isuzu trooper, most under rated 4x4 on the market.For less or the same money then a 4Runner you will get a more capable and spacious truck.
I have a 2202 3.5l auto and change the oil every 5 000km.Got to do fluid on tranny but a bit nervous to do it my self.Why the bad rap for these tranny's?