chocolatekitsune has a really really good setup one.

Ooh, if you do one, let me know- I'll invite you and we both get a bonus on your first month. :)

Well, if you ever do decide to make a Patreon, my advice would be to create a page with a certain theme or project in mind; I say this because from what I've seen, the pages that have a specific project in mind (like a webcomic or video series) tends to do the best.

If you're just going to have it be purely for straight artwork though, my recommendation would be to make tiers based on accessibility, with the lowest tiers granting the most basic access. For example...

$1 a month - patrons can see all of your finished works
$3 a month - patrons can not only see the finished projects, but the sketching/inking phases of all of your pieces
$5 a month - patrons can vote on potential content
$15 a month - patrons receive a single character sketch

Now obviously, you don't have to go with this example exactly, but this will hopefully give you an idea of what you can offer for your Patreon page,

Oh and one more thing, if you do make a Patreon page, seriously consider doing your artwork as a "timed-exclusive" based posting system. I say this because some of the people that only posted exclusively to Patreon, didn't tend to do that well for their Patreon pages; either because people boycotted their pages or just flat-out set up a fake Patreon page themselves and pledged to other pages without having paid anything to the artists that they were supporting.

It's gotten a lot better now though, what with Patreon instituting safeguards to better protect creators from "faux patrons", but it's still something to lookout for.

Anyway, I hope what I had to say helps and I wish you all the best on your latest venture. =3