@trinsec Might be able to solve it a lot cheaper if it's just a bad breaker.
When I first moved into the house I'm in now, the circuit breaker would trip every time I tried to use my microwave while both my computer and fridge were already running.
Once I finally got an electrician in to take a look, it ended up being a bad breaker that was like a $5 replacement. Haven't had a problem since.