I use Tight VNC. It is more or less real time but most things except 3d rendering. Regular VNC.... is not very good at all. Gigabit network of course. I am open to other suggestions but I do run Linux systems.

And I build it myself because I need something custom fit for ME. I need something that meets MY needs and allows me to spread out and have a TON of information at my disposal. It also has to be comfortable. In order to achieve my goals, I had no choice but to custom build it. It took me about 6 months to build it all and finish my boxing setup but to me, it was completely worth it.

Although once I get my new CNC fabrication equipment and 3d printer... I may be tempted to improve on things further

We will see