Should you take out a loan to grow a business?
Yes if in fact, you are very confident. it will grow your business and provide a turn on your loan.
For example, if I borrow $100k I need to have my company either increase profit $25–$30k per years allowing me to pay off the loan by year 4 and then pocket the profit going forward.
You always need to ask what is my Return On Investment. If the return on the money you borrow is greater than, and I mean considerably then what you borrow, with minimal risk then it is a good loan.