Disadvantage is that I don't know if there is enough rental demand?

@Joel OwensThere are definite DIS-advantages to owning less than controlling interest in a condo project like this.

You'll also find lots of threads discussing advantages and disadvantages of getting a license, what real estate agents might do to be seen as investor friendly, etc.If you have specific questions feel free to ask.

She asked me if she could sign a five year lease while I like that but let’s take it one year at a time A lease for more than 1 year is just a disadvantage for the Landlord because the tenant can break a lease at anytime, and if you sue in court the most you’ll get is 1 month rent since it’s your responsibility to market the house for a new tenant asap.

I am experiencing investors boldly and confidently grabbing the opportunity to renegotiate contracts to the sellers disadvantage in lieu of their uncertainty and somewhat desperation. 

Not having an agent puts a buyer at a disadvantage because the listing agent's fiduciary duty is to the owner.Two, many owners are now signing paperwork that says that all offers must go through the agent.

Both Single Family and Multi-Families have their own advantages and disadvantages.

. - If the person stands to make so much money, he might be willing to take a little less to have cash in hand.To your disadvantage:- If the seller has strong external interest in the house, the price might go even higher if your contract falls apart.

What are the advantages and dis-advantages of using a CPA who is not in CA?

All the above is good and well, but what makes you think you know more about the Ins and outs, advantages and disadvantages, risks for a seller and how to mitigate them, than your agent does?