I’m surprised their voucher only covers 30%Does their monthly income triple the 70% they will be paying each month?

Years later, demographics have changed and the value has nearly tripled in the area.

He sold it late last year for nearly triple the price.

Within a few hours a medical worker booked the place for triple her rent for 3 months!

I just sold a tripled in Kitchener that was a 5% cap based on longer term tenants which means rents were lower than market.  

There's MANY reasons I don't like duplexes:Generally, lower class tenants (and that's a deal killer)You're dealing with a commerical property... harder to buy, sell, manage.Your management and maintenance will TRIPLE over a SFH of the same value.SFHs hold value better and you sell them to an end user, NOT and investor..... except typically new investor that are not skilled yet, try to buy duplexes.Also, tenants talk to each other... last thing you want.

I agree with @Mike D'Arrigo and that explains why all the junk duplex houses in Indy get flipped and turned into SFH at triple the price. 

Specifically people who have owned the property for 15+ years where I can offer them double-triple what they paid.

I take my OK salary and triple adjust it for CA.

or, you can flip the $1M (notice I didn't say flip SFH's...but that is one of the ways to flip "cash"), 5 times at 15% profit, (reinvesting the profits) and double your money.Then, buy a NNN property for all cash with an 8 CAP and get $160k/year income...doing nothing...and you could buy this NNN anywhere you want....or,...Do a $1M loan at 10% simple interest (interest only payments) for 20 years and triple your money.