I came across a cement screed specialist who do seamless cement screeding. The effect is super nice as there no joint lines but is super expensive too Are you doing sthing like tat ? If not should not have extra cost.
you might want to look for ID firms to help you in the designing. Some id do runs the whole project for you. You dont need to go to alot of ID firms , may be 2 or 3 ID. Most important is get the ID you can connect with.