Charge more, period.
Let clients back out because they can't afford you.

Start raising prices slowly or rapidly, your choice.

My buddy here doubled his hourly prices few years ago.
Now he literally can work half the time for same money.

Benefits are exponential because with half the installs he gets half of warranty calls. Also, higher hourly rates mean clients can afford better gear. Better gear, hopefully means more stable systems.

YMMV