Huge tax breaks, near 0% vacancy loss, and a substantial discount on the cost of the property seem like good reasons. 

A few pointers:Do as many as you can before you have kids, because having small children will absolutely kill this strategy, bless their little hearts.You are smart to buy distressed property at a discount, then put some sweat equity in to fix it up.

If you are like me, I am always looking for a discount or a deal when it comes to buying things for our flips.  

There is a liquidity discount for cash now, happens all the time in finance.

If a seller understands that they are selling their house at a discount and signs off on it, then they are within their rights to do so. 

"Great" for your tenants, they are getting their space at a 20% or more "discount" compared to market because the previous owner or manager didn't price the space (using the rentable sq ft method) "correctly".Your Market -So you have a building 100% leased.

Buying a property like this all cash means that you eliminate competition from any retail buyers, and get a discount accordingly, but the risk is that the house needs work.

Looking to add value to investors actively pursuing properties because we have consistently discounted property opportunity on our desk.

When sellers accept this kind of discount, many times there are issues the seller just hopes will go away, or be missed.  

So when you start stacking up a bunch of those things it can be clear why FSBO is not a favorite versus listed properties by their peers.It's also another reason why buyer brokerages shy away from discounter listings.