Like Jake Baker suggested, keep good records and have a dedicated bank account for your property, properly separating personal and business expenses.

This is not personal, but if a person cannot save money now real estate is the worst investment to get into as it is one of the most cost intensive businesses to be in.  

My thought is that the people that ARE using it for lead gen/outreach, automation etc. will keep the methods to themselves until the advantage of early adoption is done and that business segment is saturated, then they will sell courses to everybody else..

They should be proactively communicating with you as to why they can't find a tenant and discussing options with you.PM's do get busy, so before firing them, try to have an open conversation to find out why it took so long and what can be done to rent faster in the future.

I am a beginner in this and I would like what basics questions should I check before getting into this business.

I am in the business to make money .Plain and simple . 

There are a couple of things that come to mind, if a payment is missed the lender cares, if the servicer goes out of business or misses a substitution of trustee, the lender cares, if the borrower goes to the lender to try to get removed from the loan (usually to buy another house) the lender cares, if the property gets caught up in a bankruptcy or divorce, the court cares and that means the lender gets involved.

I always remember that rockstars know rockstars, so find someone who is a mover and shaker - likely a meetup host - and then ask them who they know.The people doing 100 flips are super busy, so I've also found the best person to find is someone who is a step or two ahead of me...so maybe for you, that is someone doing 2-3 flips a year. 

These cities boast a forecasted job growth rate of 38%, driven by a thriving tech sector, healthcare expansion, and a business-friendly environment, which continues to fuel property appreciation.

So to answer your question, there is financing available for certain properties that have good business plans.