First and most important - DON'T say WALKING DEAD in relation to this project in any way. You don't want to open a legal can of worms and there's already officially-licensed "Walking Dead" decks out there.
Second, you're pushing into well-worn territory, covering a zombie deck. US Playing Card Company themselves have released at least TWO zombie decks - when that happens, you know it's a well-worn idea. There's been dozens of zombie decks out there. Your biggest advantage is the quality of the artwork and the fact that people can "buy a face" in the deck.
But you have a disadvantage as well - you're using standard indices in an old design. It's tough to appeal to collectors with that kind of deck. It's a good thing that your core audience won't be collectors - it's going to be zombie fans.
The fact that you're using a cheap printer also works in your favor, though if possible, consider an upgrade as a stretch goal - I and others here could name a few high-quality printers that work for reasonably low rates.
Also, consider making your back design a two-way design, identical when rotated 180 degrees. It's not the kiss of death to use a one-way back, but it helps as two-way designs are generally more popular. It's not a must-do in this case, though, since you are making more of an art deck than a players' deck.
Best of luck to you! It isn't my tastes, but you have the potential for a good project here.