Upgrading to the 6?

Hey guys, I currently have an iPhone 5S on verizon and I want to upgrade to the 6 when it comes out.
My plan is to Sell my 5S (for around $450) a couple days before the announcement for the 6, port my number out to google voice which will cancel my verizon line and i pay the ETF, but i still have another line active on verizon, so it won't completely cancel my service.
Then I plan on going without a phone or using a wifi only phone for the next couple weeks till the 6 is released, when I will start a new contract line for the 6 and then port my number back over from google voice.
Will this work? Will verizon have a problem with me canceling a line and adding a new one so close to each other?
Or will I be better off keeping the line I have active till after the 6 comes out, swapping the numbers, and canceling the 5S line and pay the ETF?

 

Yeah I'll be fine. I was thinking about maybe opening a non contract line with some cheap used phone I got from eBay or something.
As for demand. I'm gonna stay up all night and order it as soon as it's available like I did with the 5S

 

Anyone?