Really late addition to this thread but if you wanted to go through with this plan, it is rather polyphasic unless you want 1,000 something decks to yourself and a huge monetary deficit. USPCC is the best way to go for quality and customization.
1.) Do their limited run of 100 decks with your concept. This way you have a tangible object to send to people to review and promo.
2.) Advertisement and hype: Once you have your card design concept ready... blast it everywhere, get feedback from Instagram and YouTube cardists/magicians, pay people off to properly review your deck (the more well known guys who would likely not waste camera time on your cards)... whatever it takes to get ready for the next step. Sell them that pen.
3.) Assuming you get positive feedback, kickstart it. Set goals that you think are reasonable and rewards for your supporters. Get a feel for how limited of a run this V1s will be and the quantity you need printed. Your design may even get picked up by a larger distributor.
4.) Now with crowdsourced money, print your 2,500 decks, give the funders their cut and from there you can sell them and keep a good quantity for yourself.
This isn’t the cheap and quick way but with investment of time, work and money on your end you could see a decent return and get your dream card. Will it be completely unique to you? No. However it is a solid method to get your idea out from the ether into the physical and not go broke.