my suggestion: go bigger than ten.
I wanted to start a reef and was thinking of doing something smaller (20-30gal) but after doing some reading it was clear to me that for my first tank it would be a safer investment to go with something closer to a 55 gallon. The reasoning behind this is that by having a decent volume of water- your chemistry (temp,salinity, ph, nitrates etc) will be MUCH more stable.
This is KEY in my opinion and I am grateful for that advice. Once you have your system down, and a better understanding of how saltwater works- then attempting a nano tank such as a 10 gal would be fine.
The best thing you could do is start saving now! haha because the costs will keep coming- and when you go to buy- make good investments that will ensure that you dont just waste livestock- not to mention hundreds of dollars - buy aquacultured or tank raised livestock as much as possible- it will do better in transit and captivity as well as you wont be supporting the upsetting the delicate ecosystems that make up our natural reefs.
READ- as much of the "new to the hobby" faq and other 'stickied' threads as you can. RC is a priceless resource - make the most of it.
-find a good lfs (local fish store) with some experienced staff that are helpful. (ie not petco- you want people who can teach you about marine biology and how to keep your critters thriving)
best of luck!