dude that sump is tiny, what's your stand look like? a standard 55g would be much better and allow room for more love rock and a fuge if you sectioned it.
pump price is ridiculous, my 6600gph pond pump cost the same.
not a huge fan of the skimmer design and you should get the plubming parts from your local buidling supply store, not the pet store.
and forget instillation and delivery, you can do that yourself. In fatc forget the whole thing and start from scratch.
how big a tank do you have?