"By 2012 more than 100,000 flats will be added to this"...
2012 is in 4 years. Do you know that around 70,000-72,000 new workers are coming to Doha every year?
4 years x (at least)60,000 = 240,000 new workers (AT VERY LEAST!!) will be in Doha by that time..."

The good news is - almost 90% are at low income bracket and this flat is not for them, so it will still be left vacant... or teh rate will go down