The Mag 9.5 can easily pump 800+ GPH
if all horizontal, it's a beast of a pump and the head height mostly applies to vertical head not horizontal although you should factor in about 1 vertical head height for every 20 ft horizontal so 50 ft of hose horizontally equals about 3 ft horizontally and then with the 4 ft vertically added you have a total of around 7 ft vertical head height pressure against the pump or about 600 GPH
when all is calculated into the equation. (assuming it's on the same floor)
I pump my water 20 ft horizontally and 4 ft up and I still have to throttle back the pressure so I don't blow my tank away.
Having said all that I'm thinking more of in a room far from the tank on the same level but still on the same floor but at least you could keep the trashcan in another room. Either way you will need to coordinate with someone to turn the pump on/of more then likely. I use a long extension cord with on/off capabilities plugged into the pump to toggle the pump on/off which is easy.
If pumping from the basement you would need something more powerful like the Mag 12 or 18 which would give you nearly the same GPH
as the 9.5 on the same floor.
I bought mine from www.bestnest.com
and was very pleased with the price/service/shipping.