It sounds like you have laudible goals and an entrepreneurial spirit.
There are really two general ways of getting money for starting a business. One way is through a small business loan from a bank, and the other is through venture capitalists.
In the case of venture capitalists, unfortunately, you probably won't even get a phone call returned if you're looking for an amount as low as $500k. (I know, that seems like a lot of money -- but venture capitalists are usually looking for high-risk, high-reward propositions, and to them $500k is usually too low of an investment for them to be bothered with. They're looking for big ideas with big impact -- something like the next Google.) And they also usually want to see a demonstration of strong earnings potential -- they often step in once the business is already kicking, and just needs an "extra boost" to take it to the next level. They tend to like business propositions that will have national or global impact, as that raises the potential earnings ceiling much higher.
You can try to knock on the doors of some venture capitalists (do a search on the Internet), but I don't think you're going to find much money there. After the dot-com days, venture capital money has really dried up and is extremely hard to get -- you have to have a killer idea and a strong team in place to get venture capital support. But, always worth a shot, especially if you can find a venture capitalist that already lives in that region and shares the same aspirations as you.
The first steps of your plan sound reasonable enough -- really, just expanding your current business by adding an employee or two, some extra equipment, etc. You ought to be able to get a small business loan from a bank to support some of that -- probably not for $500k, but you can't blame a bank for being conservative about the money they loan out. After all, I believe over half of new businesses fail within the first two or three years. You have been running a successful business so that should help you a lot, if you can document that. Getting a loan of $50k is probably reasonable, although you might have to put up something as collateral.
For your ambitious goal -- making your geographic area a more I.T. friendly place -- that really has to happen from the state government on down. Sections of the country that have become healthy I.T. places (e.g., around D.C., the "Research Triangle" in North Carolina, Silicon Valley and Silicon Alley, etc.) did so with strong local government support -- the local governments actively recruited companies and sweetened the deal with tax breaks and other incentives. It wouldn't hurt to contact some of your political leaders at the county and state level to get their opinion and advice. Sometimes, state or local governments will provide assistance programs (such as loans) to small businesses to encourage growth in weak areas.
In any case, before someone else (a bank, venture capitalists, etc.) will loan you a penny, you need to have a detailed business plan that outlines exactly how the money will be spent and how you think that will result in revenues, with measurable milestones.
My advice would be to try to grow your current business in smaller steps and see how that goes. Are you turning away business right now that you could otherwise pursue if you only had a second employee? Then try to add a second employee, perhaps providing them with a profit-sharing plan if you can't initially pay them a high salary. And in all cases, be careful to consult with a lawyer, especially one well versed in small business issues.
That really is the key -- whether you're turning away business right now and have a sense for what the natural demand is for the types of services you want to provide in that area. If the demand is there, the money will follow, but you might have to approach the growth in a less ambitious way. And also, be aware that big businesses will swoop in anytime they see a chance to make money, so competition is never far away.
It sounds like you're ambitious and I wish you luck -- I'm all for seeing Wardensville gain a reputation for something other than as the largest speed trap in the state of WV!