Your post got me to thinking... As mentioned, the lack of an enlarger would be an issue, but another consideration is developing 4x5 negs. How do people do that these days? Back in the day (1970s) I tried tray development once and said never again. I bought three rubber open-top tanks and a bunch of stainless steel sheet film hangers in 4x5 size. Filled the tanks with developer, stop, and fixer, unloaded the film holders into the hangers in the dark, and did the entire development in the dark, using "lift-and-dip" agitation. Worked well enough. Do most people use Jobo rotary processors to develop 4x5 these days?