Private hostels for students
It is a good market with high demand, but the regulations have to be implemented firmly for better service to the students at rates slightly higher than those at the DU halls; till funds are available for construction of more halls.
Some NGOs are already operating female hostels for service women. The NGOs can come forward (initially) to assist in the residential problems of the university students (both male and female, considering that the majority come from the rural areas and small cities).
In the developed countries paying guest accommodation with families is also available, but in Dhaka the right culture may take some more time, as the cultural environment is not congenial at present (violence, terrorism, lack of discipline, politicisation, etc).
Pre-tendering information and feedback can be collected, before calling for tenders, and a couple of pilot projects may be awarded for evaluation and assessment, for improving the draft code for these private hostels. Doing something is better than looking helpless.