By "here?" you mean on the forum? The only way to do it is to advertise your services or goods on the correct sub forum here such that it produces $7-10,000 per month.

Instead of focusing on how you make that much money on this forum you should define how you can make that much money anywhere. What skills do you have? What education do you have? What can you do? And will someone pay you enough per hour or transaction to equal the monthly income goals you have?

Once you have that defined you can think about the different areas of the world (including this forum) where you may solicit work.