Mine are like Jill's......and I have a couple of those carports, too
Just remember when building that lumber panels are 4X8 and you plan the size, distances between posts based on those measurements to need less cutting. If you have a lumber yard where you shop
ask them for their "discount/damaged" pile. I have gotten some perfect lumber, salt-treated and all, for 25% of orig cost simply because it was discolored, had slight damage, etc. Look, if I need an 8' board and the 12' one has damage at the END.....but costs far, far less, I buy it!! I have gotten some fantastic buys on 4X4 posts 2x4, 2x6 & 2x8 lumber by doing this. If you are doing a door, you need some smaller cuts, etc. At a farm you always find yourself in need of a board or post or two. My last buy is still nicely stacked....$120 for about $800 worth!
Another thing I have found for wind breaks and sides (like the carports), is panels of fencing. My son
worked for a while for a company who did a lot of work for a major outlet. When they installed new fence (mostly privacy, vinyl & wood), the old had to be hauled away for disposal. I have a stack of this wood fence panels!! Some panels have ends that need to have a few inches cut off of the bottom but this leaves a 5.5'X8' section. Some were in wonderful condition. A very inexpensive enclosure.
A couple of my fields now have a 8x16 or 8X24 run-in that cost me more for the tin on the roof than the entire balance of the building!