Kyle - Looks like you have two distinction questions, 1) Whether to refinance, and 2) Whether you should move out of the duplex. For the first question, it seems as though your calculation should investigate how much cash flow it will cost you to pull out the $21,000 in equity. For example, if you're cash-flowing $200 now (with you living in the property) and after refinancing the property you'll cash flow only $50 per month, it's costing you about $150 per month to access the $21,000 in cash. Or, about $1,800 per year, which is 8.5%. Therefore, the question then becomes with that $21,000 can you go and find a property that gives you better than a 8.5% return on your money. The question on #2 may depend on your lender if you decide to refinance - i.e. whether you need to live in the property for a certain amount a time. However, trying to answer both at the same time may be confusing. I would figure out how you want to handle the refinance first, and then think through the moving out question.