To Leverage or not to leverage?

[Melissa Lee]

I have a condo in SF with about 40% LTV. Its currently rented out. I'd like to refi and pull money out to purchase the commercial unit below it. How much should I pull out? I can go up to 60% and still take a chunk of change out, but my mortgage will be higher than my income. Should I disregard if Im re-investing? The income from the commercial unit will cover more than cover the increase in mortgage...