I also have the 44 Gallon trash can. I use 3 partial pythons to siphon from the top and middle rows into the can. I also take a submersible pump and put into the bottom tanks. The pump is hooked to a hose that runs to my sump pump pit. From there it is pumped into the yard.
When the 44 gallon gets full, I move the pump to the trash can and drain it. While that is draining, I clean algae. When the can is empty again, I put the pump back into a bottom tank and move on.
I refill using a python. I hook it directly to the sink in the basement. I do not use the attachment for siphoning water out because it restricts the flow too much. I just hook the hose up to the end and i pump the water into the tanks and add drops while it is filling. No water storage for me. Usually I do a 50% water change on everything in the fish room in about 3 hours. 1 hour to drain and 2 to fill. I used to drain some tanks while filling others but made too many messes. Now I wait to get the fill hose out until if finish draining and put the drain hose away. I use different hoses. The drain is attached to a hose reel and it is attached to the sump pump cover so I do not accidently pull the hose out and fill the basement with the old water. Been there and Done that. The pump I use came from Home Depot and I have never sucked a fish up. Well, yet..