It is 3 bed 1.5 bath upstairs and 3 bed 1 bath downstairs with a kitchen and separate entrance.

@stephen Anderson: In this case, I think I can use my LLC as a beneficiary for all of my separate trusts, right?   

Nice to have a HELOC backup though, if you ever separate from your job you can use that to pay the loan back so you don't get stuck with tax penalties. 

There is one book for 49 states and a separate book for California because it's so heavily regulated.

The egress is separate from emergency windows.  

One of my favorite things about BP is at the end of every podcast they used to (maybe still do I can't remember) "What separates those that make it from those that come and go?"

HiI don't have much experiance with duplexes.I would greatly appreciate the help with the following question:Is it  possible to sell each unit separately ?

It would be smart to create a separate account for all your deposits to make it easier to track the income.

Two separate bids should not be too far off from one another.Go ahead and make an offer on the property, but make it contingent on several things like full city approval, permits clearing, etc.

If they share parking maybe see if there is a way to separate the parking either with designated spots or separate driveways.