Duplex, Triplex or Quadplex?

[Ben Raptoulis]

I am looking to purchase my first house in the next few months and I am strictly looking for multi family homes. What has interested me the most is the quadplex units given that could provide the highest monthly income. Hoping get some information from people who purchased one of these types of units as there first home or even people who have good or bad experiences with multifamily housing.