Can I edit these sites myself?

Probably not. But then again, it's not rocket science. Anyone familiar with basic html and Dreamweaver should be able to implement the site easily. However, a safer bet would be to hire a qualified professional to adhere to the blueprints and make sure nothing is amiss. Typically this will cost anywhere from $500.00 to $1500.00 depending on how closely you adhere to the original template. Consider a plumber analogy and you'll be fine.