It looks/sounds like a lot of your problems are focused around switching between tools. Invest in a couple 14g splitters and/or extension cords and do some semi-permanent wiring for your tools. Splurging on extension cords is worth it for safety.
If that planer is a lunch-box style, I'd recommend putting it on a flip-top table as soon as possible. You may even be able to leave the other side bare and use it as the outfeed table of your saw. This goes for all dedicated bench-top tools.
If you are set on keeping the radial-arm saw, see if you can make it's table pull double-duty. Build a bench around it, or embed it into an assembly table. At the very least, build a cabinet into the base if it's open.
If you truly aren't using the Bandsaw, I say sell it. See if you can get a good price, and either re-invest in a bench top 110v model that can be tucked away somewhere, or put it toward cabinets. If you want to keep it, make sure its on a mobile bench so you can tuck it out of the way. You may want to consider trading the floor-standing drill press for a decent bench top one. Unless you are frequently drilling into long stock, and even then, you can mount it to the side of a bench and swing the head out over empty space. You could probably fit it alongside your radial arm saw without compromising either tool.
French cleats get thrown around a lot as a recommendation, and I'm going to include them here. The shear flexibility is worth it, and the materials are cheap. You can fit rails into a lot of dead spots, and hang stuff like finish-can racks or fastener boxes. Best feature is, when you move out, just lift whatever you've built off and it's ready to go onto the racks in your next house.
Check out Jay Bates' youtube channel for other ideas, he's got a lot of early videos about setting up shop in a very strangely shaped space (old apartment).