Good questions, and the answer obviously depends on your current setup. If you only watch cable and don't stream anything (i.e. Netflix, Amazon Prime, Hulu, etc.), then you'd probably have to invest in some hardware like Roku, Apple TV, Amazon Fire TV, Chromecast, etc. There are simple "stick" devices that cost $30-$40 that do the job. Likewise, there are now quite a few options when it comes to live-streaming tv providers. Each has its pluses and costs range from $20 for the lowest Sling TV tier to over $70 for PS VUE and DirecTV Now packages that rival what you'd get with cable/satellite. Internet prices also vary by location, if you even have competition in your area, and many other factors. So it's impossible to give you a specific answer without knowing the details of what you're paying now for everything you get, what channels are must-have for you, etc. One big advantage to me about the streaming services that should not be overlooked is there is no service contract, no equipment that you lease. You have nothing tethering you to them and can bounce from month to month depending on if you even need service. You can add and drop by sports season if that's all you care about. You can add HBO when a show you like coming out, drop it as soon as the season ends. Just re-activate your account whenever you need to.
I've never tried any of them, but I have a friend that uses Sling. It definitely has Hallmark and Hallmark Movies. He does have to switch his package around for football season to get ESPN. Here's a list of their channels: https://www.sling.com/c/channels?classification=us
All except Directv Now have a DVR of some sort, and Directv Now is supposed to be adding DVR soon.
