That would work. I'd get the filter first, look into the aquaclear 110's, nice hang on back filter.
if you are only doing fowlr
at least at first, the skimmer isnt high on your list, especially if you wanna just get your cycle started.
get a good liquid test kit like API saltwater master kit, you'll need it for cycling. maybe get your powerheads next.
Then onto sand and rock. And you're just abotu ready to cycle. Yo dont need lights for the cycle ro
even for fish only.