This is a good start. I think the biggest things that need work are materials and lighting. Why are the walls so shiny in the first piece? Gather photo references of real world walls, and examine closely what their materials look like. Then replicate those materials. Secondly, the lighting needs finesse. Again, examine…
These renders can definitely be done in realtime in higher quality even (although he might need to use his software of course, which might not support that) No way is the actual rendering a week. If he has really terrible settings and a super old laptop maybe a couple hours. The camera shots also are max one hour each in a…