You will find out quickly that the filtration of the AC50 will not be enough. If you wanted to add a sump, Eshopps makes some nice over the top overflows that don't require drilling the tank. Then a small 10 gallon tank in the stand with some basic sump components (protein skimmer) and you're good to go.
If you are in a rush (and you should not be), there are many bottled products that will allow you to get your tank cycled quickly. I'd like you to ask your Dad how he cycled tanks and then let me know what he says. I'd be interested if he is familiar with the cocktail shrimp method (he probably is since he's an old-school reefer).
With live sand, all you really need is a piece of live rock from an established tank to act as a seed for your nitrifying bacteria colony. No need to go through a cycle in my opinion.
Your tank will require faithful, weekly 20% water changes, particularly if you aren't running a protein skimmer. It is how you will keep your nutrient levels under control. Also, it is how you can replenish elements taken from the water by life in the tank.
I would do all tank husbandry (substrate churning, filter cleaning and glass scraping with a razor). Then use the water change as a way of exporting all the junk floating about in the tank.
Dom