One of the beauties of Linux is that there are distributions for just about any need. One size doesn't fit all and in my opinion, it is better to find a distro designed from the outset for what you want than to try to add or remove features from a distro designed for something that doesn't fit your needs.
VectorLinux is targeted at home and small business desktop users. It is not designed to be a server distro, though with some work it can be modified for that use. So at the outset, I don't think VL is close to what you need. You might do better with something like Red Hat, Slackware, SuSE, or distros that will most likely be used for servers.
I don't think it is insulting to VL if you say we're not what you're looking for. I do wonder, though, if what you want is even possible. Will all your users have the same hardware? How else could you "deliver fully preconfigured systems that are ready to use by anyone"? Certainly you could develop a distro that could provide identical software configurations (I think most distros already do that if one accepts the defaults), but if the hardware isn't very similar, one size wouldn't fit all. I don't have much technical knowledge and could be entirely wrong, in which case I would be happy to be corrected.
When you say "it's dedicated to professionals who use the product at work. So it has an entirely different mindset than what other's would be accustomed to. It's the kind of mindset that I prefer," I think many of us aren't sure what you mean. Red Hat and SuSE are targeted to the enterprise user. VectorLinux is not. But that doesn't make VL and its developers "unprofessional." They are quite professional in providing a product that meets the needs of home and small business users very well. Many of us Vector users would be quite upset if VL's focus changed from the desktop user to whatever you mean by "professionals." There are other distros for that.
I wish you luck in your quest.