I pay $30 a month for Comcast - most all channels other than HBO/Showtime/similar. It's their ~$75/month package, but when you call them if you get the right person on the phone they will give you whatever specials they have available.
If you want to go completely cable/sat free and get everything via the internet you can go with Aereo ($8/month for all the local OTA channels), Netflix, Hulu (free or plus depending on the device you go through), Amazon Prime/Instant video, and GooglePlay or iTunes store. That should get you almost everything you could want, completely legally, and a lot cheaper than $100/month. If you have an Android device, you can get DroidTV which apparently gives you a bunch of other stuff available as an Internet DVR for $3 a month, but I've never used it. With all these combined you still need to be patient, some shows are available the next day, others take months or are even only available to buy. Forget about live sports/news though, I don't think any of these support liveTV. I know you mentioned AMC, but I think that really depends on what show you want and when. Guessing you are talking about The Walking Dead - that's available through Netflix. I'm not sure how long the wait is, but all the previous seasons are available now.
Now, if you don't care about staying legal, it's actually easier to get everything you could ever want, setup automatic downloads, etc. It's a sad state of affairs when it's easier to "steal" shows than get them legally. This includes live TV.
Check into XBMC as a media front-end. Tons and tons of add-ons for both fully legal as well as the more questionable media sources. Something like Roku wouldn't be a bad option either.