My best advice is NEVER go in house. There are more problems than you can imagine and it is not worth it at all. The cooperative will not make more money doing this. The laundry room should not be looked upon as a source of income but rather an amenity that should not cost the cooperative to operate. Should one machine needs replacement it will take at least several months to make up the expense of buying a new one. When you have a vendor doing it it will not cost the building a penny. Think of all the complaints that you will receive, and who will collect the money and make deposits to the bank, not the management company, it's not their job. I could go on and on but I think you get the idea.