Scott I'd strongly suggest you check with your county building inspector. Get the right information up front! Work with your expected fuel company as well.
I have an above ground 120 and moved it from 10 feet from when we moved in to about 20 feet from the house to get it outside the fence. Since we bought the tank and don't pay an annual rental fee, we don't get a discounted price on fuel. There are a variety of code restrictions and your county inspector will have your requirements.
Above ground, anchoring, below ground, burms, utilities, - there are many variables.
Mother has an above ground 1000 gallon tank with a burm that enabled hers to be 75' from the house instead of 150'.
When mother built, her contractor put in a tank that the local company refused to add to her service contract. Initially we were under the impression it was a contract deal, but the tank had not passed a visual inspection and although newly installed and never used was actually not a "brand new" tank. Hydrostatic testing etc has to be done on any pressure cylinder every so many years, visual internal inspections, etc etc etc.
The tank also couldn't be moved since it wasn't empty, and you guessed it - they couldn't empty the tank since it wasn't inspected, and since it wasn't inspected they couldn't connect it and use the fuel in it. Good grief, always something right? They finally made it right but, who'd have thought it would be such an issue.