Depends how much are you using this. Looks like right now, for k80+4cores/15G of ram, you will have to pay $0.26 per hour.
PC with 1060 would run you probably less than 600USD, so ~100days of using VM 24/7, excluding network traffic on one side, and power consumption on other (although, latter should not be that much when looking at the whole cost).
And you will still have pretty powerful PC at your home for everyday use/gaming
One benefit to owning the hardware is that you can use it mine cryptocurrencies when you're not using it. I bought my GTX 1060 for $200 used in March 2017, and it's generated around $1300 worth of Ethereum...
It's been at around $40/mo net since March, briefly shooting up to over $100/mo in July (when the price of Eth increased faster than network Hashrate) and now it's back down to $40/mo. The overall profit is higher than the sum of the monthlies because I managed to hold some Eth rather than selling.
And you will still have pretty powerful PC at your home for everyday use/gaming