I have 6 cars I want to have in a garage, I have the choice of a pole barn 100 feet from my house, I have space to build up to 60 x 100. or I can attach something to the side of my house and come off at a 45 degree angle and I would have to make it a little taller and I could use hoists to lift up three and park three under them and make a service station look. It would be easy to heat and cool because it is next to the house. Both would have to be insulated though the pole barn I am not sure if I would use drywall or T11. Is building up more cost effective per square foot on average or building bigger?