I have the DTV online Sunday Ticket (and have for years). On the site it just asks if you can get DTV, you say no and it let's you get Sunday Ticket online.
What's interesting is theoretically I could get DTV in my condo building, but they 1) won't let residents put up their own dish and 2) have some sort of contract with Dish Network so they ONLY offer that service.
I think it's like $250 this year, but has been totally worth it for me and that's despite the fact that the Bills v Pats are on TV here twice and I usually go to two games a year. Still there are times when I'm on the road that it's been a lifesaver and totally worth the $$$!
I typically stream on my PS4 at home, or my laptop or phone on the road. All work well, though as has been stated you can ONLY be logged into one device at a time. For example, one time I was streaming on the PS4 at home, but had to go to an engagement - when I left, I forgot to turn off the PS4, it was still logged into ST, I couldn't watch on the phone, I nearly freaked out.
For me, totally worth the investment! In fact, it's the reason I bought a PS4 a few years back - need that Bills fix!!
Or there's some other place you can always get the games for free, but not sure if you Redd..(about)..it?