My setup:
TabloTV (4 Tuner, but I think 2 probably would've worked) (One Time: $275 box, $150 lifetime sub)
AmazonBasics Antenna: $25
Old External Hard Drive: $0 ($99 or less if you have to buy one new)
Amazon Prime ($100/yr, but paying for that before because of shipping)
Netflix ($9/mo)
Roku x 2 (One Time: $200)
One Time: $650
Monthly: $17.33
I'm saving $65/mo on my previous promotional price, so my breakeven is 650/(65-17.33) = 14 months
I'm saving $115/mo on the non-promotional price, so that breakeven is 650/(115-17.33) = 7 months
This doesn't include internet, which I was paying for before. I'm really missing sports (baseball right now), but otherwise I've been just as happy as I was with cable. My wife, who isn't techie at all, is happy with the setup (we have an Amazon Fire, but she likes the Roku better). It's not as slick as cable+DVR, but it's not $50-$100/mo worse for sure and my wife actually likes that she doesn't have to switch inputs on the TV anymore, it's always on the Roku. We tried sling, wasn't convinced it was a good value and had some technical issues (on demand stuff that wouldn't stream, getting some permissions error in the middle of a live show and having to restart the channel, etc.). One thing I am noticing is that with 2 kids and a stay at home mom, I'm pulling roughly 250-300GB/mo (my provider doesn't have caps, but I'm keeping an eye on it anyway).