I've had three different opportunities to buy a duplex. 

My first MF I represented the buyer on I made 100k. for maybe a weeks worth of work. 3. if your going to be looking a more resi style duplex 4 plex a lot of those get listed and having access to the MLS is far superior to any other on line listing service ONE simply because you will be able to talk to the actual LIsting agent not someone paying for leads.And then of course having access to MLS lock box's and not relying on agents.. this is huge.Now if your maybe going to buy one property sometime in the future and you have no interest in learning the RE laws of your state or making any money with transactional real estate then sure.. its a pass.. although I would still recommend the pre license course so you learn the basics  the vocabulary and states unique laws.. knowledge is power in RE.

Use an FHA loan for a duplex or triplex, live in one unit, and rent the others to offset costs.

The advantage to doing a few lots for a duplex or quad plex at a time would be it’s easier to sell a few in a limited time than 9.

Now that I’m approaching 50 I’ve graduated to house hacking a duplex instead of my primary residence.

I am a realtor in Marlyand and last year I bought my first duplex which I currently house hack.

In class C+ to class B areas SFH, duplex, triplex and 4 plex.

I am an out of state investor and looking at duplexes in fort valley close to fort valley state university.

The build cost would be a little higher because i would use foam in the exterior walls and also use insulation in the interior walls for energy saving and sound dampining.

There are a lot of investors that want to get started and don't have the money to buy a 20 unit, but want more than a SFR, so they buy a duplex to quad.I only know of a handful of quads in my market that got cut up into 4 condos.