Yeah, You'll have no problems but you don't need me to tell you that, like you said there's nothing out there which can seriously compete with it, and most importantly no-one plugging serious money into being top dog. Think you're doing a grand job with it so far, and the more we contribute and get word out the more this moves through the rankings and the less spare time you have in your life! lol
Don't envy you mate.
I've been doing a little bit of SEO each day recently..... adding noindex tags to thin pages etc (at current member profiles are indexed, they won't be soon),created a Google+ page, adding various pages like the login page to robots.txt, built a few links, etc.
Google have got us on the 3rd page now for 'Norwich City Forum', previously nowhere to be seen, so with a bit of luck with will be 1st page next time they fancy updating the placements. Don't ever expect to outrank the Pink'un, whilst the messageboard is attached to that old site, but I'm shooting for number 2.
I actually used to work in SEO, that game changes fast and is hard to keep up, but I'd be very disappointed with myself if I didn't take that #2 spot!