I can't help you with Patreon but I can give you some advice about publishing, since I have some experience in it.
First, if you're looking for a publishing company to help you get a colorist or a letterer or assemble a whole creative team, GOOD LUCK! Very FEW publishing companies will help you search for a creative team (and those are mainly the big ones like Marvel, DC, Image, maybe Top Cow?) but for the most part they expect you to recruit a team and submit something together. Definitely do your research and read their "About", "Contact", and "Submission Guidelines" pages for details since each publisher is different.
I suggest looking in Facebook Groups, LinkedIn, Elance, deviantART, and such to advertise you're looking to start up a creative team. I've worked with many comic book writers, and they're always putting themselves out there to find artists, letterers, editors and the like. Publishers and independent publishers don't really do that.
Secondly, you could always do a Kickstarter. I see plenty of comic book creators starting up a Kickstarter (once they have recruited their team) and some of the donations goes towards paying the artist/editor/letterer, etc...Also it helps build your audience! If you have an interesting enough story, ambitious characters, and maybe a cemented plan with the comic series, you'll get some people who'll join you. Try to think of different kinds of compensation like either paying them, Kickstarter, or even sharing in royalties. Most creative teams will assume they're getting a portion of royalties, but I've been paid before upfront without being part of the royalties and it doesn't bother me. Just depends on who you're working with.
Third, some publishing do accept PDF submissions. Again, do your research and read their "Submissions Guidelines" page. Here's a list of all publishing companies (from all spectrums, even the indie ones). Feel free to take a look and save it for future reference: THE DEFINITIVE LIST OF COMIC PUBLISHER SUBMISSION GUIDELINES
If you have anymore questions, feel free to ask me! ;')