Need advice on tank

Ok so the 75 gallon tank plan i had is a bust, Had to put 4 new tires on car cause of construction stuff. Sold the tank for 65$ so i made 35$ profit

I want a bigger tank but i cant break the bank its already broken lol I plan on transferring everything out of my 10 to it minus the stupid damsels that my gf likes and the sand.
This is the 10 in question and its inhabbitants
http://www.3reef.com/forums/show-off-your-fish-tanks/little-piece-heaven-137836-3.html

What is a good size/price tank that i can use my current light over?
Odyssea Metal Halide Pendant
20 long? 29 tall?

I plan on using dry lace rock and the rock out of the 10 also.

Can i just move the inhabitants over and add the rest of the water being new?
Or should i leave all the polyps/mushrooms/xenia/candy in the 10 on the sandbed?

If so for how long?

 

i mean it all depends on what you want to do? do you want a big 75 gallon tank? if so scan craigslist just the other day i saw a free 75 gallon and stand on there. save up buy a one and all that. if you dont want to do that then go with a 29 tall.

 

I had a 75 gallon tank.
got it for 30$ at goodwill

The money i was gonna use to set it up wen't out the window

I have enought equipment to set up a 20 long or a 29 which would be better for a reef with the light i have. Plan on keeping all kinds of coral and 2 clownfish.

If i drain my 10 in the 20 or 29 and add the rest of the water i need from mixed will my tank recycle?

Will i be able to add the clownfish in right away?