They are often located in lower-income neighborhoods and may need maintenance or renovations.

Should I invest into Ohio, or stick with Vegas?

Should give you an idea as to whether it's worth it or not.  

So my question is, for investors what is more important margin or volume?

Dump the thing and either hang on to the cash while you find a performing asset or 1031 into something that does perform.

I'm just beginning but am considering a bigger commitment in the next five years or so by accessing some or even all retirement funds to buy a building (I'm sure people have thoughts on whether or not that is a good idea!).

Would you be looking to owner occupy the property or strictly as an investment?

I am in the process of closing on another house in Oregon.

I'm trying to understand if the lease begins on the day of closing or the day after, if closing is at 2pm. 

I decided to look into an official duplex or triplex putting 150K down that has value add with renovations and potential unit add but it wont have as much equity because it will be an on market deal.