I can't help with the mole problem but here is my renovation a couple years ago on a little over 2 acres. I spent 2 years amending the soil before I even started. The front yard was tilled with top soil addded in while the back yard had the old grasses skimmed off and then Harley raked.
I don't know if your climate will support Bermuda but I used a medium grade Bermuda seed and my lawn looks terrific. When all the lawns here are brown or dead from drought mine is as green & lush as you can get.
A final consideration you need to think about is the financial as well as the time involved in maintaining an area that large. Good Luck! Scott