Dishwasher: Water usage and disposer

[Steve Mcdonald]

Hi and Happy Holidays!

I have 3 family unit in Queens. 2 floors have 2 bathrooms and 1 floor has 1 bathroom. I am looking to add dishwasher for all 3 floors.

I am looking at 2 models

GE GSD2100VBB which has a built in hard food disposer.

Frigidaire fbd2400ks which has a self cleaning filter. I think it uses a mesh with water to break down the food. It does not need hotwater as it heats up the water and uses that.

My question is. For tenants will either disposer work.

Second if all 3 apartments have dishwasher would I face issues if all 3 go on at once as I am afraid of getting complaints of not enough hot water.

Does anyone also have any experiences with these model or close to these?

I currently have top level ao smith 75 gallon tank.

Thanks for your help