How do you know when you have found a good deal?

[Account Closed]

Let me begin by introducing myself...  I am about to start my final year at Clemson University as a Financial Management major and a minor in Accounting.  Real estate has always interested me but it wasn't until my tax professor told me his success story and one of my good friends began his own journey that I realized it was what I want to pursue.  I have decided I wanted to do rentals because I posses most of the skills needed for home renovation/repair and do not mind screening and dealing with tenants.  I plan to buy my first property when I graduate and I am leaning towards buying a multi-family home and living in one unit and renting out the other unit(s).  Once I get on my feet I may begin to invest in mobile homes.  I still have a lot of research and learning to do.

So, I have a few questions for the experienced investors...

1.)  What are the things you look for in a property to ensure you are not making a financially devastating decision? 

2.) If you find a property that interests you, what is your next step?

3.)  Are the monthly mortgage estimates on some of these websites accurate and reliable (such as the ones listed for each property on redfin, trulia, zillow, etc)?  I've never levered money so I am not familiar with the rates.

I would also like to hear some of your stories and experiences with investing in multi-family homes.  And mobile homes?  And any other advice that you wish you knew when you are starting out.

Thanks and I look forward to hearing from you.