I'll add my enthusiasm for a needed product and for someone who really has some energy to make this a solid application. Caution - don't burn yourself out like so many developers do.

We need you.
Small bug, I think - before I blew up my test platform it appeared as if I could not edit an ad to make it a premium ad. I placed a test ad as an Admin, but could not get the premium status to stick when going back in and editing.
Small question - Is it possible to hide the Search Box? And do you know what CSS I need to change for the background within the Search Box?
Test platform is back up and I will do some more testing tonight. Do you wish to have an English speaker alert you and make suggestions for better English when I find something that should be corrected, or would sound better if modified? Of course I can do it privately.