Nope all free downloads for the guests. With the open booth we were struggling with printing enough photos for 10 guests etc. and i did not think they were worth it as the quality was iffy. I used to run a print business and I expect better quality - Every photo booth i have seen has printed really crap prints tbh, so hand out a card that diverts them to the website. If you would get an A5/A4 print of yourself then that would be fine, but i find the little photos crap. Why not download the full size and print at home or at photoshops?
Definitely get a proper studio flash and diffuser! Dlite one i have is great.
i just don't think the speed lights cut it on their own, and you will need back up anyway.
You can run the dlite with trigger from the speedlite, a cable or wireless trigger.
You can see the difference here:
This was with the DLITE & 1 speed light:
Attachment 17386
This was with 2 speedights only:
Attachment 17387