So you put all this time and love into a project you've been dreaming about for years, only to turn around and sell the house?!!!! EEEEEK!!!!
There's one thing I've learned about making home improvements specifically to sell a home...
You don't know what your buyer is looking for, and 7-10 times, they will turn around and tear out the thing you thought sold the house to them in the first place!
I don't want to discourage you, I just hate to see that kind of stuff happen.
Do have fun on your project, and learn from the experience so you can boldly go where you haven't before in your new home. Oh, and when you get moved in, build your new pergola right away. 15 years is a long time to waste on "somedays".
Best of luck to you!
PS Next time you update, start it with a new post so everyone will catch it. As you can see, 3 days worth of posts take quite a bit of space!