My answer is that there is no way to get Sky movies on the cheap. The movies that Now tv show as I found out to my cost are older than the ones currently been shown on Sky. The sports package with Now didn't work as you have to pay per view. Infact I couldn't get now working on my iphone or ipad because of software issues. I got a refund.
Of course you will get the iplayers from UK TV but you can get those without having to pay for another box.