It's hard to make good suggestions without knowing your budget.
Well to boot you'd need a plan from your ISP that allows webhosting; usually that's the business plan. Next you'd need to obtain a static IP; again usually only available on a business plan. Now you need to look at bandwidth: depending on how many users you plan to host, and the quality of the video chat, you're looking at from a lot of bandwidth to more than most people can afford.
I'm not familiar with the state of Utah, but generally DSL isn't suitable because your upload wouldn't be very fast. Cable would be better, but again it would pricey; you'd want at least 5Mbps upload. Please let me make this clear: download speed does not matter as long as it's as fast as upload. Here in PA, a plan like that commands about $150 a month. That's not including installation and contracts. XMission is one host I know of. I hear they are pretty good, but in no way will they be cheap. An idea solution would be at least a DS3 line—maybe a $1000 a month?
A vBulletin license is $180 for a perpetual license. IPBoard is quite some added cost. That's nothing of course compared the monthly bandwidth. Really that's the killer.
Most other software is free. PHP, Apache, for your hosting. I don't really think it's a viable solution for most people; I'd just get a hold of a shared hosting for $100 a year and run it off that. If you insist on hosting it yourself, OS X isn't the ideal server. Something like Linux is better. And you can build a lot better server for the same price.
I hope you have evaluated your business plan. Running a forum yourself won't be cheap. Unless you are willing to shell out big bucks, I'm afraid there aren't many competent people who will do it pro bono.
Oh if you want to run 3 of these sites, just take your expect cost and multiply it by 3 or more. I hope this is just an idea you decided on today; if you have a long term plan, and enough support it can work.
Good luck.
