I’ll have to think about it for a moment; in principle I’m leaning towards ‘yes’… (if we agree on some things)
What is good is that you’ve built most pages with Stacks, which makes the transition a bit easier. You say that you did use the “Blueball Element Stacks”. So these ‘officially’ seem to be the “Freestack Stacks” from Charlie Lockhart, right?
Nowadays, we would say that this is a ‘framework’. The ‘Freestack Stacks’ were actually the first framework on the market and way ahead of their time.
Nowadays, of course, they are outdated, so these stacks (and probably most of the other stacks used in the project) would have to be replaced by another framework or other stacks.
This raises the question of which framework should be used (I personally would no longer use a conventional ‘theme’).
There are currently several high-quality and recommendable frameworks to choose from, such as ‘Foundation 6’, ‘Foundry 3’ or ‘Source’. I myself have been using Foundation 6 exclusively for many years and if you were to place an order with me, I would insist that you use this framework.
This is my website, where you can also see the last 30 to 40 websites that I have created with Foundation 6: Web-Portfolio - WOLF websolutions GmbH
In addition to the cost of my work, you would have to buy Foundation 6 and upgrade to Stacks 5.
Then you would have to decide whether you want to create all content in RapidWeaver as before or whether you want to use a CMS (like Total CMS). This could save you some work in the future, even if the initial outlay is somewhat higher (and you would also have to buy the licence for the CMS for your domain).
If you are interested in having me take over the revision of your website, we can also discuss everything else via email.
By the way: For several reasons I would suggest to have an SSL certificate for your website…