Glad to hear you are building a set!
You will love them I am sure.
I would take the front baffle and the plans to whomever is going to cut out the parts and have them make sure that all the parts fit perfectly before leaving. Especially if you do not have any woodworking tools or skills. Start the assembly by dry (test) fitting all the parts before gluing so that you understand completely how it should go together. The top ramp part is the hardest to fit and clamp so plan that out carefully. Refer to my photos at the start of this thread. That should help with the sequence.
I did one side at a time but you could do the whole thing at once just be sure to use a glue with a long working time. I used Titebond 3. It allows more time before setting.
As far as how many clamps? There is a saying in wood working that "you can never have too many clamps" I would say you can get by with 10-12 12 inch clamps and 4- 24 inch clamps. Some of the smaller 6 inch clamps are helpful. I really like the reversible type that can spread as well as clamp. The DeWalt's are my favorites.
Now for those with no woodworking skills or tools I highly recommend buying a flat pack kit from Jay (Captinhemo) he says he should have them ready soon? They come pre-fitted and should be easier to assemble. Jay are you using dowels and/or slots (rabbits) to align parts? I'm sure he will comment on that.
The divider brace should have the inside edges rounded over so a router is needed for that. See my photo's.
Good luck and ask any other questions you may have.