geeze this is a daily statement, or goes kinda like that.
"WOW, all that testing and those chemicals, I don't know if I'm smart enough" that another one that makes me smile.
OR " I stopped by the Fish store and the guy told me , I needed , ~!#$$, and #$%%#~$, and (@#^*(, it ended up costing like 1000 plus dollars!
well, let me start by saying you can spend as much as you want, and there will still be more you could buy.....thats why its called a HOBBY

First you have to decide what kind of fish tank you want. ie.
*Reef tank - all the live corals, live rocks etc
*Fish only tank ( community or aggressive) , and no that does not mean you can't have anything from the reef tank, just the cost factors start changing.
* or some kind of combo / hybrid
The thing I've observed in my 28 years of retail and tank maint. is almost anything can work, it depends on how much time you want to give to the aquarium. The more you want to spend, the less work you have to do.....TO A POINT, after a point you have so many gadgets you then spend as much time looking over them, to keep them operating......right Archie

I got side tracked.......a basic 30 gallon marine setup from the ground up, to keep fish alive would cost you about 250.00- down here at my place, I only say that because as the web is world wide, you my get the screwing where you are

Now back to my 250.00, that gets you to the point where all you have left to buy is the decorations, fish and put the water in.
Again, I will revisit this article and add to it, in time. Tiff / Arch / Doug feel free to spout of your thoughts