question about DIY inivites... (long sorry)

i ordered a mock kit from Card and stock.com.
now i am have a design sketched out but here is where i am stumped..

where should i buy the inner content...
1. Invitation
2. resonse card and envelopes

Do the kits at michaels or ac more include this.

Do you still do inner and outer envelopes with diY pocket folds.

Has anybody got an estimate on how much postage it is to send out Pocket folds? sorry for all the questions just trying to determine if i am better regarding finances making it your self or ordering them. of course if i order them im not going to order pocket folds. Open to all suggestions. Really looking to design a pocket fold fairy tale invite. Amy i crazy?

You can do the inserts - invitation, response cards, etc. yourself - the easiest program to use is MS Word.

In regards to pocketfolds - I find no need for an inner envelope, so I addressed the outter enevelope as if it was the inner. The pocketfold itself protects the invitation, which is usually what the inner envelope is for.

As far as how much it weights, on average .63 for a pocketfold with about four inserts. However, it goes upon weight, and some papers weigh more than others, so you'll have to take one sample to the post office to get the most accurate price.