If Deed of trust is junior to the foreclosing mortgage then do they expire after non-judicial Foreclosure ?

The plan will pay the first lien holder and you better have an appraisal to back up the value if you have a junior, otherwise they will undervalue it and cram you down to an unsecured lender. 

Is it like a junior/mezz debt position?

They tend to have co-signers - their parents - who don't want Junior starting off life with an eviction.3.

Much of it too gores with what class they are in, grads are usually more serious, sophs and junior seem to party more, not to get off topic, but I like older adults to guarantee the place.

When a first mortgage holder forecloses, that extinguishes all junior liens.

Junior SaltersAs you said, it does depend on the market and type of property, but a good start point is about 8.3% (1 month/yr).

To rent it out legally, it must have a heating source, connection to sewer, and a kitchenette at minimum.So your options are: Convert the illegal unit to a legal ADU and rent out that plus the main house OR tear it down and build a legal ADU but you can not do both on a property zoned LARD1.If this was a multi family zoned lot, you could do 2 ADU units.On a single family, you can have 1 ADU and 1 JADU (junior ADU) but the junior ADU has to use a portion of the existing home (there by being attached) and can not be greater than 500 SF with its own separate entry from the main house.Hope that answers your questions. 

Hi, I am buying a Duplex and want to know if I can convert part of one of the units to Junior ADU?

Missing the annual summer trip for one year so you can get into real estate and now that rental can help pay for juniors college might get her to see that this real estate thing might have some worth to it.