One effect of expensive rents is that people are invited to pay the
rent in sex.
Agreeing to sex as rent is a solution for one person, in the sense
that person obtains lodgings for less money. However, when you
look at society as a whole, this doesn't make the situation any better.
If X obtains lodging this way, some Y becomes homeless.
To improve the housing situation for everyone in the short term, we
need either rent control or a lot of new housing construction. A lot
of new housing construction will drive rents down while making space
for more people. Rent control won't increase the amount of space
available, but it will enable all the renters to get food as well as
housing.
In the long term, having fewer children will help tremendously.