Kodi is great - but I am not sure I would 100% trust it with live sports. I don't want to miss NFL games and I find that live sports are very hit and miss - there are always servers offered but a lot of the time can't connect, or stream is terrible...etc. That said, an OTA antenna and sling TV probably solves the issue.
I tried out Sports Devil and never found a stream that was watchable.
It's kind of a PITA. As the sites that host streams constantly change web addresses to skirt being shut down, so must the app be updated due to "scraping" the feed information from the sites themselves. As far as I know, this app doesn't auto-update, meaning you have to hit google and dive into forums where the latest updates are being discussed, and links provided. IMO, it's more trouble than it's worth to cut the cord, strictly sports speaking with SportsDevil as an example. Kodi rules for non-sports content with apps like Genesis and IceFilms, etc. taking care of just about anything you'd want to watch on demand. My setup is absolute base cable package that nets me all the live sports channels I need and fast, wired internet. I end up only turning the box on for something live news or sports related. If you cut completely, the price of your cable internet will go way up. You can get deals, but I've found that to be hard to come by. Tonydead has suggested going to a Xfinity store (in my case as a customer) with great results, which I plan to try once my 2-year deal is up, and that might be a game changer for me. Otherwise, the amount of money you'll spend on stuff like Sling, HBO Go, Hulu, Netflix, etc. will fill the gap of your savings anyways to fill the gap in what you're dropping. The upside just isn't there for me personally to edge out like $10-20 tops a month and have to constantly maintain the setup.
$44 for 50 Mbps, no strings no contract.$20 for Sling
$15 for Sling HBO, I could save this and just get the shows I want elsewhere but I want to support the streaming services.
$8 for Netflix
$0 for Amazon Prime, I don't count this as prime shipping pays for itself.
$0 for OTA
-$8 for Netflix because I already had this with cable anyways.
$79 per month total after making the change. I was paying over $200 per month before with all the receiver fees, HD fees, modem fees, etc. Not to mention the price kept going up every year. I occasionally get some shows elsewhere, but, it's been a lot less than I expected as the combination I have covers almost everything I was watching before on cable. I also expect that these streaming services will continue to expand and improve.
For sports I guess I don't watch any more than what comes on the major networks or ESPN since I haven't noticed missing anything. I will miss NFL Network/NFL Red Zone though so I'm still working on a solution for that.