they keep building villas whereas they can opt for a small flat or 1-bedroom or 2-bedroom units which is easier to be rented to expats.

Also since these villas were not designed to accommodate many people, even the water and electrical requirements (include the sewage and garbage accumulated) were source of problem not only to the tenants, but also to the surrounding community.

It's really a matter of planning and projection which the municipality or concerned government agency should regulate!