Fixed Rates Vs Variable Rates

Variables are in the mid 2's right now.  Fixed are in the low 4's.  I'd stick with variables for now.  I'd consider moving it when variables = fixed.  

People are worried about rates going up, implying their mortgage payments will go up.  

The easy way to defend against this is to set up a line of credit against your properties.  If anything goes wrong you will have access to funds to hedge your monthly payment. 

The other reason you should set up a line of credit is to have the downpayment to buy your dream home or to buy a rental.  If rates continue to increase, the market will slow, providing opportunities to buy.