Oh and before going with T3 I'd buy the required spots using the cheat. Once you'll have a steady supply of daily gold I'd max out on the loan and buy the parcel immediately: if you think about it the rent is basically an unlimited loan with huge daily interest rate so if you dig a lot it'll end up being incredibly expensive very quickly
There are massive differences in gold/m³ so digging in a good spot is crucial: in the Old Arnold's parcel alone (which has the lowest amount of gold) I've seen squares ranging from as low as 200 oz up to 550 oz Since you have the cash I'd invest it immediately in buying the drill.
