It is the most reasonable way to collect according to the size of the room. But you can't just set the rent, you need to refer to the price of the surrounding rental houses.

I suggest your friend go to the surrounding rental house before making a decision.

In addition, the rent should not be charged according to the number of renters, so since the area of B and C is the same, the rent of B and C should be the same. As for how to divide the two girls who rent room B, that's their business. So your B and C rental prices are unreasonable.

As Room A is the largest and most complete, you can charge more according to the suite.

Room D has a bathroom, but the environment is poor, so you can charge less.

Personal plan:

Room A 1300

Room b 600

Room c 600

Room d 500