MB10- I think most in town kolleilm are expecting the wife is working to bring in at least one salary. Between that, government programs and the kollel check, you can live very comfortably if you spend on what you need. The kollel check is meant to be that last bit to help make ends meet, not to be full support.
It gets back to the question of which kollel years are we talking about? For the first 1-5 years this plan can work well. If you are talking about say years 5-10 that is a different parsha once things like tuition come into play.
If anyone has numbers to prove otherwise I would love to hear them.