lol, that seems very complicated, and will be very hard to maintain. Why? When these people are wanting to post, you might not be on, and if you reply with their text after the time they wanted to post, it might seem strange. Additionally, it'll be very hard to manage as for these people are sharing the same account (yours) and might be posting on the same topics.
But still, good luck
Thanks
Its not too bad to make few posts in same topic.
i can post 2-3 times in day, as fast as I can