Streaming it from your phone to a chromecast would probably be the cheapest option. I don't like the idea of fiddling around with my phone for Netflix though so I've got a Roku 3 hopefully arriving today to replace my Google Nexus Player which seems to be getting more unreliable by the day.
My timing is as impressive as always. I've just set up my Roku 3 and I see that Roku earlier today announced (in the US at least) they were refreshing their product line-up.
That outdoes my buying a Moto G 3 only for the 4 to be announced a week later.
On the plus side, I like the Roku 3. Netflix is certainly painless enough and having headphones that plug into the remote might come in handy too.