That would help a great deal. Why not throw in some eggs with assorted veggies and pre-diced up ham into a tortilla and just nuke it before you go to work for breakfast. Wrap it in foil or something and you can even eat it during your commute. Once your in a routine it'll go really fast.
Protein smoothies are really fast too. Just throw in some milk, fruit, super food or greens would be a nice add in, protein powder, and ice cubes and voila. You can up the calories by using extra virgin olive oil or heavy whipping cream. Feel free to vary ingredients. In fact I'd encourage you to. I'm sure if you thought about it you could manage to make something like this at work.
Food allergies can develop from eating the same thing over and over again. This happened to me with milk and eggs so I had to totally cut them out for a long time before I could have them again. What would happen is that when I ate those foods, they make my throat feel itchy, I'd build up a lot of mucous in my throat too, and I'd feel queasy.
I don't know about hospitalization, but if you eat the same thing over and over again vitamin deficiencies can happen. You've heard of scurvy, right? Happens from not getting vitamin C. You end up with bowed legs and immune system issues from it. It just depends on how long you go without certain nutrients and your individual make up (some people respond better than others to nutrient deprived diets). But maybe your one of those people who can just eat ramen all day everyday and be fine. It's kind of like rolling the dice, you never know until you've done it. Although I would hope you would notice something is off before landing in a hospital lol.
And there's no set in stone rule about 5 meals a day. Whether losing, maintaining, or gaining weight, I usually only eat 3-4 meals a day. I eat real light before work and eat something light while working too and then pretty much gorge on healthy(ish) stuff when I get home. I'll sometimes have protein powder in water and a piece of fruit 30-60min to working out if I feel too famished to get anything out of one. I also make large batches of food on off days too so I have leftovers for a couple or so days after off day for when I get home and sometimes for breakfast.
I know you just want to have the same thing over and over again for simplicity but a person is optimal with a varied diet. And there are ways to accomplish that with a large workload without going crazy from added food work and time. It just takes a little more thought.
With a decent diet you may even find you respond better to the stress in your life and recover better from workouts.
Whatever you do, good luck.