Beef Jerky is quite good but quite expensive it comes in different flavors personally I like the teriyaki flavor.
I love beef jerky. My favorite brand is Big John's Beef Jerky.
Personally I like Jack Links but sometimes Ill make homemade beef jerky using the dehydrator.
Is it difficult to make beef jerky at home? I don't even know what a dehydrator is haha.
Not really you just let it sit in the fridge in the teriyaki for a day or a couple hours. Then put it in the dehydrator for a day. A dehydrator basically just removes all the moisture from the food you can use it to dehydrate fruits like to make banana chips as well. 
That sounds super easy actually. Bet there's a lot of easy-to-make snacks that can be created that way.