@MarieChele Porter, Welcome to BP. You cover a lot of ground in your post and each question you ask is a great question to consider. My recommendation would be to take a deep breath and begin your education. I started my education and found the more I learned the more I found I did not know. To help, BP has some great educational tools, and most are free. I really enjoy the pod casts, webinars, and blogs. Additionally, read read read there are great books available on the RE topic.
To address your question there are both pros and cons to SFH and multi family. I have read some fantastic debates on those two asset classes in the forums. Do a quick search and you will have reading for days. If you're interested in the Indy market you should really come and visit, however, I would suggest you take time to educate yourself in order to get the most out of the trip.
Generally speaking you need to be very cautious if you plan to purchases duplexs - quads in Indianapolis. Those types of properties tend to be in less desirable areas and have the associated problems with being located in those areas. That is not to say all duplexs - quads are bad but caution and really understanding the Indy market is required. I have spent the last five months driving Indy extensively and now understand that I really didn't understand the complexities.
I would be happy to chat your off to a great start by asking the questions. Feel free tomPM me. I am always happy to provide my lay persons assessment. I am by no means an expert and there are others far more knowledgeable on Indianapolis. In any case welcome to BP!