One thing to consider - what is your goal? To do a successful Kickstarter? Or to produce a deck of cards? These may seem similar, but they are FAR different.
If your goal is to do a Kickstarter, the playing card part of this is going to be secondary. The quality may suffer. We see this ALL THE TIME.
If your goal is to do a deck of cards, don't worry yet about messing around with a kickstarter. Design a great deck. Improve it. Get feedback, and improve. Make the deck itself your priority. When it is ready, THEN decide where best to go to make it happen.
The dream of doing a Kickstarter is really appealing to a lot of people, but despite the fact that you see a lot of people doing it there are in reality very few people doing it well. Kickstarter is a tool, one of many. Focusing on that is kind of like saying "I want to use a hammer, so I am going to build a house." That house is not going to be good. Instead, flip things around. "I am going to design my dream house. It is going to be this big, and have this many rooms, and will be this style." Eventually in your process the time will come to use a hammer. Pick it up and use it, but keep your eye on your dream house.
Go make your dream deck of cards, and come back when it is ready.
// L