It's easy to get excited and want to rush into buying the next property but I think that's where many investors make mistakes. Don't try to force it. Save up the funds, wait for the right deal. I personally think the market is peaking and now is a bad time to stretch yourself and take on higher risk.
I'm more conservative than most folks and would rather not keep a ton of debt on my properties.
Before you start looking out of state, make sure you have a reliable, trustworthy property manager in the new city. The biggest factor in the success of a property is a good property manager!