About where I could mount a bilge pump... Although in looking, the Gusher diaphragm pumps don't seem to be very high capacity... 300 GPH vice 1700 or 2200 GPH for some other brand pumps.

The Jabsco 36600 Series Diaphragm Bilge Pump looks to be what I have for my shower sump... at a mere 8 GPH... (which seems about right for how long it takes to empty that sump)

I think I'll stick to a submerged pump... as I want something "just in case" and not normally needed.