Invest in RE or debt payoff

[Brad Kirkwood]

My wife and I most recently bought our first personal house and I've been educating myself on real estate investing ever since.  When making a few repairs, we had taken out a personal loan for about 5k @ 9.9%.  We clear a bit more than 1k every month after bills and other living expenses from our jobs and by November we should have enough to payoff the balance of the 5k loan completely.

My question is, should we pay this off as it is the highest interest debt we have or use this money to finance the downpayment of an investment property sometime later on?  Closing costs are a bit high since we live in Pennsylvania and I've yet to go beyond just educating myself in the world of real estate (as I've just started a few months back).  Thoughts are appreciated.

FWIW - we would like to have another child sometime next year and daycare is not exactly cheap.