I've done a lot of research on the career of a real estate agent and decided it was what i want to pursue.

Look through the items and decide what are non-starters for you.

You'll be warning other landlords that she's a bad tenant, and - who knows - maybe one day she'll want/need it off her credit report and decide to pay you off. 

Over the years i have been extremely passive with the business and never took the time to really learn how to property invest in real estate, i just assumed i was doing things correctly, i didn't know how to do the numbers, just went with the flow.Since im down to 5 rentals and i made a very small amount of money selling off the negative cash flow rentals that just never recovered from the market crash in those 2 areas, since i bought to high in the peak of the market prior to the crash. i decided to apply for a mortgage to purchase another rental in my local area using some of the new knowledge i have learned recently, but after applying for multiple mortgages most of the places i applied basically said no, that cash flow to money lent to me is in a risky zone, basically i own properties that were not bought with rental numbers in mind, so turning them into rentals they barely cashflow except for my very last property i purchased that i did basically a flip on, that left lots of room between the mortgage payment and rental rates in the area.

I have just one duplex in Indianapolis right now, but I'm hoping to buy more either SFRs or multifamilies--still deciding. 

I have decided to jump into real estates after the age of 50.

We lived it it for three years, but recently decided to rent it out.

What if you show the place and sign a lease with the new tenant, and on their move in day you find the the old tenant has decided to stay another month?

Instead, we purchased a townhome in the rice village/west university area and decided to "House Hack" part time by renting it out as a vacation rental.We are actually in the process of moving back to the Nashville now, so we've listed the house for sale (just posted details in marketplace if you want to read more about our experience).

Instead of trying to grab financing at the purchase phase of our deals (which was leading to only finding deals that meet only our minimum requirements if at all)  we decided to go after deals with all cash where there was more value to be added and where cash could really give us a much better purchase price and resulted in the numbers we want (Cash on Cash / Cashflow).