Hello. For sales I recommend checking Petco's website to see if it's time for their ''Dollar Per Gallon Sale''. That sale gets you 50% off the price of your tank (It's called the ''Dollar Per Gallon Sale'' but the sale only goes up to 40 gallon tanks and then you can only get 50% off and that only goes to a maximum of a 75 gallon tank) so it's worth it. I honestly would make sure to buy the filter, gravel, decorations, etc. before the sale as Petco tends to try to raise the price of those items, so at checkout you'd still have basically the same cost as without the discounts. Also, checkout your local Craigslist, Ebay, Goodwill, Letgo, etc. as you can find some really good deals when people are moving and desperately need their tanks gone, sometimes even fully stocked with fish. Goodwill also almost always has good deals on tank SETS, if you can find them in store. Lastly, yard sales are a great source as well. I wish you the best of luck in your endeavors, keep us updated please!