I would like to extend a helpful hand to you in any form that I can just for giving me that bit of advice.

Tenant erected a 12 x 12 outdoor extendable living accommodation shed in the backyard without any permission installed permanent tiles, ran wiring in the shed for lighting, fans, for electrical devices and also for air conditioning.

I knew that one bad tenant and/or one extended expensive turnover could ruin that meager cashflow for a year or even two.I think situations like that are better suited for investors with extremely well-paying w2 jobs and/or other forms of income. 

Just plan things out so that you aren't extending yourself.

If we are going to extend funding with no or low cash to close, no monthly payments etc.  

Extended periods of intense work can have negative effects on your productivity, including burnout.

They've been extending for 1-year periods for the past couple years supposedly claiming the same thing about moving.)2.

Those listed on hotpads, zillow, realtor.com are likely close to market rent...no one wants extended vacancies so they price “at market.”

Getting early success as a Realtor isn't all that easy and it sucks working for free for an extended period before you build up a decent amount of commission - if you go this route, maybe consider joining a team, so you're fed leads (but paid less) and have tons of support.

It took the old owners 60 days to move so that explains the extended rehab period.