hmmmm... i live in Dhaka as an expat, and there is no such rent at 18,000 BDT be Sure!!!
2-3 bedrooms apt not furnished, start from 30,000 and above. Furnished apt at higher price depending location, but all expats are living in Gulshan, Banani, Baridhara,Baridhara DHOS .There are some ppl prefer live in Bashundara, Uttara Area where u find lots of shoppoing centres and restaurants, but those ppl live in private houses or less budget apt.
So it depends what budget u have to chose the comfort. We all need to have car to move anywhere especialy when have family. Ifu drive if also a plus, traffic is crazy but not as scaryas in India...;-) Lotsof kindergadens and schools, and as was mentioned above,to survive here you can find almost everything. As an entertaiment, no night clubs of course, no alcohol open sale but expats manage all this too, everything here indoor...