have you owned a salt water tank before?
they require alot of work and dedication but that mainly depends on what you plan to keep.
exclude live coral and you can cut down costs alot.
you can add pieces at a time, but keep in mind how much you are spending in the long run.
I think on your budget it is best to stick to 100-150G tank
if you need a nice wood stand
, keep in mind saltwater choice has extra parts