I have a network to deploy postpaid billing and Bandwidth allocation to 3000 users over a LAN, what Mikrotik Hardware setup can i implement? I would be most grateful for the help.
This might not be relevant or too late for you or if at all valid again, but perhaps it might help someone else in similar need. The best way is to get a Mikrotik or network consultant to help you figure things out correctly and save a lot of cost, headaches in the process. If you want to follow the DIY route, I will suggest still getting advice on your intending network topology setup with particular attention to IP addressing. Then get a billing solution that handles everything nicely.
You're welcome to try baseflexISP.com it is an incredibly easy to use networking, billing and crm solution and might simplify all processes for you.