The proposed suggestions sound great, but before you jump, have you considered the costs involved in implementing those options (that cost would be borne equally by all units), and the actual usage costs being incurred? If usage costs are $80/month, and implementation costs are $20k, then is it really worth it? Cost to one unit of $10/month or $2500, in either case they are not using the laundry. For those users that do use the laundry, it’s a saving of $10/month, $2500 up-front cost, plus the actual usage charges, whatever that might end up being.
I guess every strata has areas that are never used by some units (pools and gyms are obvious ones, but the ground floor unit might never use the lift, etc), but those facility costs are still shared by all.
PS, I don’t know what realistic figures are, but just a suggestion to work out what you are actually arguing about.