Best use for my current home

[Zulu Black]

Hello everyone! I recently bought a 1 single family for $400k in NYC and acquired a loan for $270k at 3.75% for 20 years. My mortgage is roughly $2,000/month. I lived there roughly for 2 years before I relocated to Chicago for work. Luckily, I was able to find a family that needed a place to stay because their house was caught on file, so currently their insurance company is paying for the rent. However, the repairs to their home should be completed by the end of 2020 and that's when our agreement will end. 

During this process, I learned a great deal about what it takes to be a homeowner and about the real estate business. My goal is to acquire more rental properties but I don't have enough fund for it. I'm wondering what are some ways I can accomplish this? How can I leverage my current property?