I'm sorry, but "cheap quality acrylic tanks" is an oxymoron. You pay for what you get. I have a 300 gallon tank built by Midwest Custom acrylics. Chris took the time to help us find the right sized wet/dry filter. He was extremely helpful. Our big tank was purchased through Fishtanksdirect and fabricated by Sun Coast Aquariums. The tank is well made. I recently spoke to the owner John who was helpful. Scott, the tank builder is also very very helpful.
Shipping is also going to cost. 10 1/2 yrs ago, shipping on our 300 gallon tank was $275.02 from MN to CA. (but the tank was only 350 pounds). Our big tank (2000 pounds) shipped from FL for $1,690 6 yrs ago.
For all of you purchasing tanks. It is very important to thoroughly inspect the tank before signing for it. The trucker will usually be in a terrible hurry to leave, but you should not accept the tank if you find any problems. Chris had instructed us to inspect the tank, but we did not do it. Several months later when we took the wrapping off the tank, we discovered a crack in the floor. We then remembered that one of the pallets the tank was sitting on was a little damaged. It is really scary how the shippers/truckers treat our precious tanks. As in most fields, "time is money", and a fork from a forklift coming up through a pallet can do a lot of damage to the tank.
Also, "life-time" warranties don't mean all that much. Each year, the coverage depreciates on what the tank company is going to pay if there is a problem. So you can't even be secure with "life-time" warranties. Some warranties are not valid if the tank is not set on a stand made by the builder. Ask questions about warranties, etc., before purchasing your tanks.
Wishing all of you considering a new tank well, and happy shopping. I wouldn't hesitate to go with either Midwest or Fishtanksdirect. FTD had better pricing on our big tank, which is why I went with them. FTD now has a salesman who has an office at Sun Coast Aquariums. He is there to help you get the tank that you want.....I wanted two external overflow boxes, and had them drill eleven holes on the top of the tank....then I changed the diameter of the holes, and they accommodated me.