I think you better keep saving. Even if you were going to buy it to live in, I would think you would need at least 10% down to cover everything. Closing costs etc. This would limit you to a 45k house.
If you can find one in your area for that amount and wanted to use it as an investment you would be looking at more like 20% down. The 4500 you have now is about what you would need for a reserve fund per property. I will not buy a property unless I have 3k in the bank for reserves for that property. It only takes 3 months of vacancy, or 1 bad renter to go through that.