Yep, I'll have to disagree with SnowRidge to some extent. I can understand his opinion, and he may be right, depending on what else is in the neighborhood. But when we lived temporarily for a couple of years in a mobile home park, and didn't know for sure how long we'd be there, I bought a 20' x 20' from
T-N-T Carports. Later, a daughter bought an 18' x 20' from the same people. Our only choices were that type of carport or leave the vehicles sitting out in the Texas sun and heat in the summer and rain at times, which makes it a bit uncomfortable. Many others in that mobile home park had the same type of carports.
Of course it's been a few years since we bought those carports, so I don't know what current prices would be. And at that time, they did not sell them as kits; a 2 or 3 man crew would show up and install it in about 2 hours. So you could call them and ask about a price. There may be other companies that might have a better deal, but it's a place to start.