Not sure you want to hinge the purchase of such an expensive item on one feature. I looked for a table with chairs, found it. I use the dining table as my computer/workbench.
Turned out this RV also had a smaller table behind the passenger's seat that I use for my 2nd computer. Both computers are towers with large monitors. Room for eating is secondary. I carry a folding TV tray for that. Then I have the requisite collection of WiFi ready Android tablets, phones, smart TV's etc. so I have a VPN. Pick up WiFi, port it to my other devices.
Also, I thought for a long time that I could just drive to Amish country near Elkhart, Indiana and have those carpenters build me something if I needed.
Point is, I never tried to find a RV that had a perfect workstation. That gave me many more options as far as floor plan.