In addition to flipping houses, I own an agency that consults startups and aspring entrepreneurs in all sectors to assist them in growing their businesses to new levels.

How is investing in a company you believe in, or a product you like, or a sector you know a lot in less creative than plugging a number into a formula to determine whether the property will be profitable, then writing a contract, and then passing it onto a PM company and never touch it again?  

If you enjoy any of these as a job, real estate investing affords you the opportunity to be your own boss in each of these sectors.

Like a Grocery Store, Most Retailers, and even Real Estate Traders (a variant of the wholesalers and investors in the housing sector)?

It is a hugely profitable sector if you don't mind getting dirty. 

Energy is a strong sector, and should be a good employer.

A professional turnkey operator, acquires, develops or redevelops, warranty, leases up and provides property management to his clients worldwide.

You will also want to find out about the market and sector.

Rent control forces the private sector to directly subsidize public programs. 

I have read some articles that the general global economy has been slowing down a bit, primarily the manufacturing sector.