The way it works is you need 10,000 supporters in 365 days for Lego to consider making and selling it. If it does end up being made by them, the original designer (you) gets 1% of that model's sales and five free copies of that model for yourself. Some have gone all the way, such as a Ghostbusters car model and a DeLorean Time Machine model.
Here is one I made: https://ideas.lego.com/projects/95531
I would actually like to get your honest opinions overall about it and if you have any Lego models on this site, link them here and we can critique those, too.
Also, you don't need a bucket of Legos to make your model. You can design them on your computer using Lego Digital Designer for free here: http://ldd.lego.com/en-us/download