Here's a link giving website costs for Industry . Between this link and the tutorial referenced above, which gives costs considered typical for Corporate web sites, you ought to have a decent overview of the entire process. A bit like cutting your own hair. The downside of HTML Conversion programs is that they are notorious for inserting so many superfluous commands that when you finally DO throw your hands up and call in a professional to unsnarl the mess, the liklihood is quite high that the whole thing will be so far gone it's rendered unsalvagable. Which means that the whole site will likely have to be built all over again, right from scratch.
Professionals go back and forth between several tools to achieve the desired results.
Once you determine which you prefer, you'll have to sit down and take the time learn how to USE all of it. Now, assuming you have either a job to do or a business to run, you should determine just how valuable your own time is. If that makes sense, and you've got a LOT of time, go for it. You'll be glad you did. Learning the Net.