The crowing will get louder and louder. Trying to sneak a rooster into a neighborhood is a tough thing. It takes the pullets up to 24 weeks to begin to lay. Then, you'd not want to hatch their very first eggs. Those are usually small pullets eggs. Normally, one waits for the larger eggs of a more mature female.
The age at which a rooster begins to mount varies, but it is also important to realize he needs a few weeks or practice to get it right. In order to be sure you have proper fertility of most, if not all, the eggs, the rooster needs a bit of time.
All of which to say is that many roosters are exceedingly noisy. If you do manage to hatch chicks, you start all over on the rooster issue because half the chicks will be cockerels, statistically. Perhaps you might consider partnering with someone near you who can keep roosters. Work together. I'd personally recommend that buddy system as the best plan for success.