Troubleshooting: How much does each Land Expansion cost?

I have been asked by some of my readers whether I know how much each block is to clear, so I have made a list of the amount in $ and the time it takes to clear:

So, to unlock the whole of District 1, you will need to spend a total of $18150, and will take 56 hours and 5 seconds (2 days, 8 hours and 5 seconds):

When you first start the game, you have a free section, then you have to spend:
$150 (takes 5 seconds to clear)
$3000 (takes 8 hours to clear)
$4000 (takes 12 hours to clear)
$5000 (takes 16 hours to clear)
$6000 (takes 20 hours to clear)

To unlock the whole of District 2, you will need to spend a total of $30600, and will take 108 hours and 20 seconds (4 days, 12 hours and 20 seconds). Here is the breakdown:
$50 (takes 20 seconds to clear)
$150 (takes 2 hours to clear)
$400 (takes 2 hours to clear)
$7000 (takes 24 hours to clear)
$7000 (takes 24 hours to clear)
$8000 (takes 28 hours to clear)
$8000 (takes 28 hours to clear)

To unlock the whole of District 3, you will need to spend a total of $7000, and will take 16 hours and 10 seconds. Here is the breakdown:
$500 (takes 10 seconds to clear)
$1000 (takes 4 hours to clear)
$2000 (takes 4 hours to clear)
$3500 (takes 8 hours to clear)

To unlock the whole of District 4, you will need to spend a total of $16500, and will take 34 hours (1 day and 10 hours). Here is the breakdown:
$3000 (takes 8 hours to clear)
$4000 (takes 8 hours to clear)
$4500 (takes 8 hours to clear)
$5000 (takes 10 hours to clear)

To unlock the whole of District 5, you will need to spend a total of $60000, and will take 181 hours (7 days and 13 hours). Here is the breakdown:
$5500 (takes 10 hours to clear)
$6000 (takes 10 hours to clear)
$6500 (takes 8 hours to clear)
$9000 (takes 33 hours to clear)
$10000 (takes 36 hours to clear)
$11000 (takes 40 hours to clear)
$12000 (takes 44 hours to clear)

To unlock the whole of District 6, you will need to spend a total of $30500, and will take 48 hours (2 days). Here is the breakdown:
$7000 (takes 12 hours to clear)
$7500 (takes 12 hours to clear)
$8000 (takes 12 hours to clear)
$8000 (takes 12 hours to clear)

In total, to unlock the whole Quahog map, it will cost $162750, and will take 443 hours and 35 seconds (18 days, 11 hours and 35 seconds).

The cheapest and shortest district to unlock is District 3.

How much $ and hours have you spent unlocking parts of the map?