Quick Deal Analyzing

[James Breder]

When youre assessing a potential deal and quickly want to figure out the cap rate of say, a multi-family place, before you actually hit up the people for financials, what is the percent you take out as a rough estimate for expenses? I've been using 35% of total rental income for expenses (including taxes and insurance) but is that too low? Should it be more around 50%? Obviously every property is different just wondering what is the rough estimate people use