Hey Jesse,
There's a lot of debate about the ideal way to build a mobile website, but your initial question made me think that you don't have a lot of time and/or money to spend on this. Is that correct?
If it isn't, I would spend some time researching the pros and cons of responsive vs. a separate mobile site (I won't go into it too much more than that - I'm obviously biased: http://moz.com/blog/seo-of-responsive-web-design). Setting your company up with the right sort of site the first time around is going to save you a lot of time, effort and money in the future. I really like Aleyda's mobile site audit to help guide you: http://www.stateofsearch.com/mobile-seo-audit/
But, if you don't have the time/money/support to knock it out of the park quite yet, building a decent separate mobile site is a good option. (You can't really half-ass responsive or else you'll mess up your desktop site too.)
You originally said you're good with HTML, so have you thought about just building the site yourself, with inspiration from CMS templates? Building mobile sites isn't that different from building desktop sites, although you want to stick to HTML and CSS as much as possible (no Flash)! The bigger issue is figuring out the design with such a drastically smaller screen size.
Like I said, you can probably look at a great CMS's design and mimic it somewhat with your own HTML. You can also read our guide to mobile best practices, http://www.distilled.net/training/mobile-seo-guide/ (ahem not to over promote ourselves or anything), which has a section on design. The key issues I'd keep in mind are:
- Use your web analytics to figure out the standard screen size for your mobile visitors. It's probably around 320px. Design your mobile site for that width, but make everything relative (i.e. 80% vs 80px) so that the display will change to fit the size of the mobile visitor's phone
- A button or link needs 28px x 28px around it to be easy to click. If it's inline links, there can be text around it, but no other links.
- Redesign for a single column layout. Get rid of ads or move them to the top or bottom of the body copy. Hide navigation behind a drop down. I really like how Bridgestone does that: http://m.bridgestonetire.com/
- Make your mobile site fast. Shrink images down to a smaller size, then compress them again (or, if they aren't already compressed on your desktop site, just compress them everywhere
). Go to http://tools.pingdom.com/fpt/ to test how fast your site is.
Good luck!
Kristina