the equipment that i have on my 72g bowfront which was also purchased (at the time) on a student budget is:
~ all-glass tank lids
~ 48" coralife lunar aqualights
~ bio-balls galore
~ emperor biowheel 400
~ penguin biowheel 350
(for the filters, because each of those has two sides to it for one of those marineland filters, i use one side with a filter, and the other i put in bioballs till they were full.)
my current set up is bare bottom cuz i didn't really have much money to buy additional decorations and such... but i'm working on getting caribsea eco complete plant substrate and then probably an UV sterilizer among other things.
because i'm usually a thrifty shopper anyway, i usually check websites such as craigslist, bigalsonline, drsfosterandsmith, aquabid, ebay... you name it i've searched it. hehe sometimes i'll even just use google and type in what it is i want. it's a good idea to check around before purchasing anyway, cuz often times different sites have sales at different times and the prices can get pretty cheap. =)
g'luck finding all the equipment you need!