Purchasing the first QNAP

Thank you @Bob , I spent some time reading/watching about that particular NAS, and it looks like a great solution indeed.
But now I want to ask you. As I understand, the major limitation of that solution is the maximum storage space you can have, and the ability to expand, right?
How many people do you think can use TBS-h574TX simultaneously? I’m wondering now, why does it have the same price as let’s say TVS-h474-PT-8G, which is four bay, without 10 GbE connection, and as I understood from the previous answers, it would be a much slower solution. Is it only about the storage space I should be worried about, or is there something I should bear in mind if I were to purchase TBS one?
@dolbyman mentioned that there is some configuration where 10GbE makes sense, and it would be the solution that you used in your case by adding the NVMes slots to your NAS. Is that something worth considering? Or it would be only more expensive, giving worse result?

I think I could say that my job is quite hybrid, which means that working on Davinci with EXR sequences is not the only job I’m doing, Most of the time now I need to work in 3D (3ds max or other 3d software), and deal with a heavy 3d assets and bitmaps in the scene, and then render it (either as an animation sequence or single image). But as I understand correctly, once I open the 3D scene on my machine, and I load the asset from the library (both scene and all the assets/bitmaps would be in NAS), the job for the disc is done, because it doesn’t load that all the time, but cache it only once when I open the scene.
I’m only mentioning that because I’m thinking about a hybrid solution now, based on what you’ve already said. What if I would purchase the 6 bay NAS (e.g.TVS-h674), where I would keep my assets and projects, and only the EXR data I would store on the extension NVMes slots ( I would purchase them separate, with 4TB drives ), would it be a solution for something, or it’s just too much of a hassle and work around, and after all it would never reach 10GBe anyways and playback speed.

I know already that a four-bay NAS for what I want is not gonna work.
I would like to have an ideal 10 GbE speed, and work with three people simultaneously.

After all 14 TB, which TBS offers, would be perfectly fine in terms of the storage space for now, so it seems like the most reasonable NAS.