In my area, you can have up to 4 units on the same property for residential areas.

We live in the Dayton, OH area.

Even if the said Reno’s are as small as a few pieces of trim and some missing soffit? 

I'm new to the area and have been finding meetups to attend which can be helpful.

Then whatever city/state you invest in I would tell you to make sure you do your research on the different areas.

Also, if you are a potential buyer, it would be very interesting to hear from you on neighborhood potentials in your city. 

Jose,There are a few ways to answer this question, first if you can buy a Primary home then Yes, $15K is enough. 

Thinking the Denver / Boulder / nearby areas because I would love to live around there, have lots of friends around that area - including my real estate agent who I'm good friends with, and its an appreciating market. 

Check out the local meetups in your area like this one.OCREIN - Learn How to Flip Homes in Less than One Hour (biggerpockets.com)Good Investing...

I would try to network with Colorado area investors.