no, you can't do that with a mag, since it's not a self priming pump.when you shut the pump off, the water that is inside the tube below the pump will go back into the water tank and the next time it goes on, it will suck air.
they also are not recommended for external use.
mag drives aren't that good anyway. i have no idea why they are the popular pump.
you can run it through the wall, into the bathroom, as you said above. you wouldn't want to attach bulkhead fittings to the wall though. it would be like running any other pipe through the wall. they sell plastic ornamental things that make the sheet rock look nice around pipes.
i think that is your best idea so far. then you only need a weak pump like a mj1200, and you can attach the R.O.D.I. right to the bathroom sink and store it under the cabinet with the reservoir.