In Plan B, if you owned 108 properties, the cost of tax, insurance, vacancy and maintenance will be double the amount in your list.
Tax: $150,000*108*.015=$243,000
Insurance: $150,000*108*.01=$162.000
Vacancy(1 month/year): $16,200*1: $16,200
Employees(5) $40,000* 5=$200,000
Material & Equipment $16,200*12*.1=$194,400
You quit your $150,000 job: