It really depends on what you are looking for.

Probably 20-120 in attendance depending on the topic.

@Alex Clark, it would all depend on what you bought and how much you paid vs. how much you could rent that specific property for. 

If you are targeting these areas with a roommate for a 2 bed, your share will be $3.5k / 2 = $1.75k  or $1.16k if there's 3 of you per month in rent give or take depending on your agreement. 

Below is a 5 year chart of best, average and worst outcomes for home prices (depending on who you are of course) from Fannie Mae, our more “conservative” price forecaster.

If your retirement utterly depends on having adequate cash flow from your properties, any downturns will cripple you.

Depending on your personal finances, shopping for a triplex or quadplex may require the existing market rents to pass a self sufficiency test, to ensure that you will be able to pay the note.

And/or are you willing to go through a potentially more rigorous underwrite to get better terms (possibility, depending on what you've got on your end). 

Prices on existing 2 families in this area range between 1-1.3M depending on the condition and neighborhood.

CA flipping can be very different than TX depending on where you were doing it... ie.