hi james , welcome to forum , there are many ways you can do this , do you have a place to keep water storage tubs or bucket ? i have a sump room so i have a valve i turn which takes water from my sump and drains to my floor drain. then in my mixing bucket 20 gallons i have a couple pumps one with a hose that i just put into the sump and refill, wc takes maybe 2 min?never have to lift a bucket . now couple guys here habe automatic wc systems hopefully they chime in