Depending on where you are located in the country, your local Home Depot may have Southdown brand play sand. This is very good for DSB
's since it's sugar sized and pure aragonite. It's also cheap. I am betting the price of the HOB
trickle system would be close to enough to buy your LR
. The trickle is going to be a nitrate factory and you will likely be plauged with algae. The LR
combo will control the nitrates after it matures. All you'll need will be a good HOB
skimmer. Check out a Seaclone or a Prizm. You really don't want or need a mechanical filter as the media will soon become bioactive and start cranking out nitrates at a faster rate than you anoxic bacteria can handle them.
with a DSB
. A skimmer. Enough powerheads to bring your total tank flow up to at least 10x the size of the tank...in your case 400gph. All you need. A trio of Maxi Jet 600's would do nicely. A pair of 900's or even 1200's would work as well if you diffused the outlet some...can't have fish being slammed into the wall of the tank as they swim by...they tend to frown on that
. You can also start with dead base rock (cheap) and cap it off with some really good aquacultured or Fiji. In a few months, your dead rock will be live rock. Patience is the key.