Putting up some pillars could be actually inexpensive to someone that knows what they are doing to being something that would cost a lot of money and effort.

Even if it will be self managed do should I still include management cost as part of the operating expenses? 

Anvi Investments (https://www.meetup.com/re-social/events/tmzxqsydccbhb/) usually has a meetup on the first Wednesday of each month near Costa Mesa.

These seminars typically cost a lot of money, sometimes over $1000, so this CD/DVD program is a bargain.

The plot does thicken a little - the ADU was/is our primary residence/address (for both ourselves and our business) before moving to Costa Rica, and is rented below market is because it's rented month to month to a family friend.

@Jeffrey Holst that is not true, you don't get pass through tax advantages but not all W2 employees can fully use them in the year taken and the K-1 accounting can cost a lot.

Commercial loans cost a little more money and have shorter terms, normally a 20 years with 5 arm, but if your planning to really do some real estate investing, it's the way to go!

Also, your lot size, access, topography, soil make-up, utility tie ins/upgrades, etc can cost as much as the actual construction.If you are looking for a really basic cost per door: I have a builder tell me (without plans) that he believes he could build a 20 unit complex for about 150-175k/door on an easy access wide open lot.  

I have a video from wholesaling and flipping expert Don Costa that may benefit folks on this thread.

I'm looking in areas such as Newport Beach, Costa Mesa, Huntington Beach close to home.Will I have to put at least 10% down or are there other ways to get around it possibly only putting 5% or 0 down?