In the U.S.A. Hygro Polysperma is illegal to buy, sell, trade, etc. So I would remove that plant from your list.
Yes you can - google Leiden Aquarium (for the Dutch city Leyden) and who'll get a lot of hits on how to set-up and maintain one. But remember in this type of aquarium the plants are first and fish (what few there are) are secondary
In the U.S.A. Hygro Polysperma is illegal to buy, sell, trade, etc. So I would remove that plant from your list.
there was an article in a fish magazine a few moths ago about that.
I had a similar setup. 55g with 30-45 Platy, ton of plants. There was a 20g filter that I never cleaned or did anything with. I could go a month w/o changing the water, probably longer, but I didn't push it. Eventually, the filter was more for moving water and mixing in air.
If I were doing this, I'd go ahead and order a plant package from an online retailer or post a WTB lot on here (unless you don't like snails, relatively few people have snail free tanks on here)
It sounds like what you want to do is create sort of a biotopic plant selection. Peter Hiscock's book, Encylclopedia of Aquarium Plants, is a little outdated (you'll find plants like H. polysperma) but still great for this.
Unless, of course, you are lucky and your LFS have awesome plants. But mine mostly have an assortment of junk, and I've bought little bits of this and that from them and from people on here, so all I have really are just a hodgepodge of plants under relatively low light. The setups I'm happiest with are my Crypt wendtii 5 gallon hex and my 10 gallon Java fern and Java mossThe 29 gallon is a jungle of mixed plants and rather unruly.
If you are doing a high (or mid) light setup, another advantage to getting a group of plants all at the same time - besides the instant WOW factor- is that it will cut down on algae. A lot of new setups have algae troubles due to not having enough plants from the onset, such as this: http://www.aquariacentral.com/forums/showthread.php?t=233454
Great tank with great potential, but needs more plants for the amount of light.