Since they are not constructed well as house they are prone to lots of repairs Iike plumbing that is made with PEX tubing and roof seams that leak if not caulked with urethane or silicon every year.

Wholesaling101 You Tube ChannelKent Clothier – You Tube Memphs Invest channel

Wholesaling101 You Tube ChannelKent Clothier – You Tube Memphs Invest channel

You can see knob & tube wiring in 6th to last picture (it's in the ceiling).  

I know the amount of electrical work that was done at my house in the late 90s to get rid of the knob and tube was expensive, per the previous owner, and it looks like this house needs to be completely rewired just from looking at a picture of the fuse boxes.  

Does the building still have knob & tube wiring?

It's my honest opinion that "Bob" Kiyosaki is nothing but a clown in the financial porn circus. 

Electrical - When they say the electrical is "updated" it could be the electrical panels and any visible wires (attic/basement) but there will almost always be knob and tube in the walls and ceilings of the units.

Where someone illegally mix mashed knob and tube wiring with new wiring, but updated the breaker box.  

You may have some old knob and tube wiring.