I work with many investors that concentrate on flipping, buy and holds and commercial investments.

Never heard of BiggerPockets until just a few days ago.I'm aged 27, 28 in November, and am a four year college graduate with a Finance concentration.

I do not know your area buy in my area landscaping is not the highest paying job so I would advise you concentrate on increasing your job security and income to allow you to save more.

What areas are you going to concentrate in?

Concentrate first on getting your career/employment on track, part time employment is totally unreliable and will make getting financing almost impossible.You need to make way more money than you presently earn.

I still work full time as a commercial property manager (VP of the company now) but I still want to get out of this at some point and concentrate full time on investments.

I have noticed that the larger towns and cities have more concentration (especially in the south and east of NH).  

Rentals are what I want to concentrate on, but what sort of rentals will produce the income I need, and will be attainable during that 15 year timeframe?

However, one of the BP podcasts, I can't remember which, had a fella who really did concentrated mailers, writing personal letters to a concentrated group of owners that fit his specific criteria.

Would a MBA with a concentration in Finance be helpful ?