NB: Most marketable ideas do no appear so in skeleton/demo/prototype form. Support, documentation, community and UI can often sell a product more than its own core functionality.
If your product doesn't have much functionality on its own, try to make it into a plugin for a popular package and try to gain some foothold (or enough licenses for ramen) that way first.
Along with developing it, you will also have to seek out the initial users and inform of them of its existence. I prefer corporate clients for this, it only takes one of them to get enough cash in hand to bootstrap the project.
If your product doesn't have much functionality on its own, try to make it into a plugin for a popular package and try to gain some foothold (or enough licenses for ramen) that way first.
Along with developing it, you will also have to seek out the initial users and inform of them of its existence. I prefer corporate clients for this, it only takes one of them to get enough cash in hand to bootstrap the project.