Mike, I would say you are a long way from a cleanup crew. But, how about a few questions:

Type of tank: Reef, FO, FOWLR, ?
Type of filtration: LR, Wet/Dry, Canister, combination?
Skimmer?
Turn Over (Sump pump + closed loops)?
If LR: Cured or Uncured (I prefer Uncured, but takes much longer)
Bottom: Bare, Deep SB, Shallow SB
Water source: RO/DI or Tap

What else guys?

First, you need to get it all plumbed, sand bed added, salt water mixed & circulating, and skimmer (if present) broken in.

Depending on type of sand and how maticulously you wash it, the sand cloud could last days and require a good cleaning of the filtration system when it is done.

Give yourself a week or two to work out all the "Kinks" in your plumbing, etc.

Next, add LR - if uncured, the curing process "In Tank" will take 3-6 weeks depending on your skimmer & filtration. Anticipate some algae cycles. Also, you want your lightng up and running at this time to get the algae to run it's course. If you don't have an RO/DI unit, and are using tap water, the cycle will take MUCH longer due to the nutrients (Phosphates) in the tap water (Better to buy an RO/DI now ... you will eventually).

Once you have added LR, start checking the Nitrogen cycle (Ammonia -to- Nitrite -to- Nitrate) - do a google search for "Tank Cycling" or "Nitrogen Cycle" if you aren't familiar. Basically, Ammonia will spike, followed by Nitrite, followed by Nitrate. You may see a secondary Ammonia and/or Nitrite spike depending on how often you test. After Nitrates are high, do a 25% to 50% water change. After a week or so of all Nitrogen levels at or near zero (esp Ammonia), you can start adding the cleanup crew.

During this curing period, siphon out ditrius on the botom of the tank, and even algae if it is really blooming. Don't tear up the algae and let if float throught the system (to the extent possible) - that will just make it worse.

A week or so after the cleanup crew (if Nitrogen cycle is still in good shape) you could add some algae grazers (Tangs, etc.) to help.

When you get ready for a cleanup crew - buy as many Turbo snails and hermits as you can afford - Aquatic Warehouse made me a great deal on a quantity buy of Turbos & Hermits.

Plan to spend at least a few hours per day on the system while it is cycleing - not that "Maintenance" requires that much work, but there will be pumps or plumbing, or whatevr that isn;t working exactly as you want - better to change it now than after everything is "settled"

Oh yea, and enjoy :-D