I'm surprised nobody has come up with an oil change kit that replaces the drain plug in the bottom with a hose you can route to the point where you could easily attach a pump.
The little 4-banger in our sailboat, an old Atomic 4,
has no space under the engine, so you
have to get the oil out via the dipstick. Or do you? A company called
Moyer Marine makes an oil change kit that replaces a plug into the oil pan on the top, side of the block with a plug that has a brass tube in it that reaches down to the bottom of the oil pan. You hook an included rubber hose to that, run that hose to a convenient place (ours ends just behind the removable companionway steps) and then you just hook your vacuum oil extraction pump to that. Gets the oil out in a fraction of the time, gets
more of the oil out, and is so simple to use you almost look
forward to changing the oil

.
Maybe I'll just fabricate one myself. Wouldn't take much. A replacement drain plug, drill a hole in it, get somebody to braze a small brass tube into it, buy some rubber hose, a fitting and cap for the end, and hose clamps: Done!
With something like that, then all you'd be left with is the oil filter, and a rag would catch whatever dripped from that.
Jim