Patio Structure (Pergola) Buy or Build?

[npalen]

I'm looking at building a Pergola like shown which is 8'x12' outside dimensions post to post and will be on a concrete slab. Can buy a precut kit of "..... constructed of #1 grade, natural select, treated southern yellow pine. In addition to this process, which prevents decay and insect damage, the pine is kiln-dried before and after treatment, to minimize warping, checking, and twisting".
The kit price is about $3500 plus shipping from PA to KS and includes pre-stained. My question is whether I would be better off buying CDA treated lumber from the local yard and do all the cutting and building myself without the benefit of a plan drawing. A concern I have is the local stock is not kiln dried after treating and this lumber is normally very wet (sometimes sopping wet) and is apt to warp severely while eventually drying outdoors. I suspect that the #1 grade specified in the kit is better lumber than the local stuff but don't know that for sure.
It would be good to know the board feet of lumber involved but don't have that info.
8' x 12' Treated Pine Deluxe 4-Beam Pergola
This is the website from which I created the $3500 price by adding various options.
Would appreciate hearing your comments.

 

[DT86]

The kit includes the materials and a set of plans, correct? How much would you be saving by buying the materials yourself?

 

[npalen]

That's what I don't know. Would be fairly easy to figure if I knew the bdft of lumber required. The kit does include items like stainless steel mounts for the posts to the concrete which I think run about $25 each times four. It also includes the material and labor for staining which can be a laborious task. I will have time available as I'm retired and have woodworking skills to build it from scratch if that proves to be the best choice.
Edit: Yes the kit includes all material and plans.

 

[murphy1244]

If you do it I would make it out of Cedar.

 

[Bigkrank]

The double dried lumber the Amish uses to build these is beautiful mostly knot free stuff. You will not be happy with what you get from a big box lumber store. Or else use cedar.

 

[npalen]

So where do the Amish buy their lumber?