I remember signing a document at closing saying I wouldnt not rent it our for more than 30 days, so that must mean I can rent it out at my leisure for days at a time?

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.

If I am spending 8 hours a week on piano and 3 weeks out of the year doing leisurely travel, I will be as happy as can be. 

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.

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

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