darkroommike
Subscriber
The best lift pumps use a float that automatically switches on the pump, and no reason you could make new bases for cabinets from better wood.I had a basement darkroom and as the house drain line was above the sink the plumber put a pump under the sink which raised the water so it could exit via a trap to the drain line. You flipped a switch to activate the pump -- a foot switch would have been better. Worked OK.
In terms of the shelf I would use plywood rather than particle board - basements can be damp and moisture and particle board aren't happy together - the stuff swells and bows. A dehumidifier might be your friend too. And hopefully there is some ventilation.