Hi,
Myself Ajai, Please see my profile for more details about my skills and experience.
I have prior expereince of customising the RPI raspbian distribution image and also preparation of custom OS image for RPI using Yocto.I have worked with VNC servers x11vnc,tightvnc,vnc4server,realvnc etc. Also developed custom VNC server and client with 'LibVNC' library. I am very clear about your requirement and i can support on this requirement.
Will use Raspbian buster Linux OS image in RPI.
Waiting for your response.
Thanks,
Ajai