When renting is a washer and dryer a must?

[Asha Carpenter]

I have a multi-family: 1 bed/1bath and 3 bed/2 bath that I will be renting. I will be responsible for the water bill while the tenant will be paying for the other utilities. I don't have a communal area for a washer and dryer so each unit will need their own. Is it beneficial to have a washer and dryer for your rental property? Is there any way to avoid having the water usage abused? Or do you think it's better to not have a washer and dryer? Thank you in advance!