I think you miss the point.

I'm not guessing one particular number. I generate an address and then compare that to 60000 known addresses with balances, thus increasing the chance by 60000 on every attempt.

The computer is on for other reasons 24hrs a day, so no extra electric being used.

250 million numbers which is compared to 60000 known addresses with balances every 24hrs!

So if it does get one, it's will have a balance.

I believe bitcrack does exactly this but uses a GPU card.

Still a bit of fun.