Realistically, you'll be paying around five bucks a month for a VPN that doesn't have a data cap, has reasonable speeds and doesn't mess around with your data/computer. I think CyberGhost has a rather generous free plan, but otherwise, I don't really know what to specifically recommend.
Not sure if it works well or not but Winscribe VPN is available as part of the current humble bundle. 1 year license for $12 is basically $1 a month for a VPN.
I got CyberGhost in the previous bundle, and it worked nicely as a VPN. Didn't use it on Netflix though, so I couldn't tell you if it works.