Also what is in high demand for coral?
Anything Exotic will sell! Xenia,leathers, mushrooms are great but don't expect to sell them for very much. Some monti caps are in high demand right now, and from my own experience they grow the fastest. You need to have enough assortment for everyone(beginner/novice/expert). I would also start out with a few colonies of zoo's. NOTHING BROWN! If it were me I would get enough money for a frag tank with all the extra's(lighting,sump,skimmer,reactor,etc). About 4 months ago I drove 2 hours north for a frag pack of 15 sps, some exotic but mostly basic. Asked the guy what he makes a month and he replied 1000.00. Of course he had another source of income, so everything he made off his coral was profit. It would be easy in my area to start off a little frag tank and make some money out of my house. The stores around me are still using coralife skimmers and selling seaclones to there new customers. Everything they sell is brown. Brown sps, brown Lps, Brown softies! Sell off craigslist...it's free. I wouldn't sell fish yet. I'm sure I will have more for you. If you have any questions let me know.