Buy building instead of paying rent- what red flags to look for?

[Jesse Meddaugh]

My partners and I are looking into buying a building in our area instead of continuing to pay rent in Northern California. We will use part of the building for our company and then rent out the other offices to cover the rest of the mortgage.

We are new to commercial real estate and have a broker helping us look for a building. They have a couple buildings that look good but what red flags should I look for that the broker might not be giving a clear picture on?

Are there any commercial calculators or places to pull data from that will give me a way to cross check the number from our broker?