GOOD JOB. 

Cities with growing job markets tend to attract and retain renters more easily, which reduces long vacancies and turnover costs.Best of luck!

They can make that jump because they still have meaningful income coming in—something most investors can’t rely on if they quit their jobs to chase full-time investing.

Some places are losing jobs, population, etc.

Or does Excel or your phone app do the job?

Usually there are other issues, divorce, death, foundation problems, behind on payments, loss of job, tired landlord and bunch of others.

A lot of his friends think that getting a "real job" or creating a "real business" is for chumps.

BUT, the proof is in the numbers, as high paying blue collar jobs have disappeared in the last 40 years, the gap between the earnings of those with extensive education and those with limited education is HUGE and growing.  

The more I learn about having the most minimal scope for greatest return on flips, I feel I could manage 4 flips reasonably while filling in gaps with small jobs.

Quote from @Erick Escalante: Since everything seems to be getting outsourced by A.I. and many jobs are at risk including middle managers, is there any threat of A.I. in the real estate world?