Gravel is probably the best economical choice. Our driveway switches from concrete to asphalt where it comes around and behind the house on one side and runs back down to the shop at the back of the property before it widens out to surround the shop with parking on each side. It's an awesome feature to be able to pull around the house and park the trailer back by the shop out of sight but also have the option to pull it up closer to the house to get it ready to camp or when we have guests staying in it. But if you're only going to be in the house 3-4 years I'm not sure you'd recoup the expense.