Repeatedly tell you, vaasthu is nothing but energy. If the energies are balanced way, you will get all sort of benefits, If the energy is inbalanced, you will get more negative energy will create some problems.
Likewise, the toilet location on the south-west is not advisable and the energy level of the place will be very low.
Suppose if you have toilet, the defect can be rectified without demolition by installing the suitable energy materials to nullify the defect.
vaasthu & cosmic energy consultant