Personally, I self manage but have built systems to allow it to be fully remote and very passive.

Lastly, ADUs are allowed for NON owner occupied properties, opening this strategy up for investors who could convert a SF into two units. 

I have one tenant who is a god send compared to most, he accomplishes nearly ever repair I need, even did an HVAC unit. 

Investment Info:Small multi-family (2-4 units) buy & hold investment.

If you are talking about 2-4 units, then it's really no different in my opinion.

My plan is to develop five 1,200 SF units, allowing tenants to lease multiple units if they require more space.Recently, a 62,000 SF medical building from a Reputed Hospital Name opened directly across the property, which reinforced my belief that a medical office setup would be a strong fit for this location.

Its a 12 unit building so lets say 2 persons per unit . 60x2=120 a day per unit 120 x 12 units = 1440 gallons Depending on area lets round it up to an even 2000 gallons . 

Quote from @Jared Goldwasser: I live in Los Angeles and am looking to purchase my first investment property this year -- interested in single family or duplex units.

What zoning code could I request a zoning variance or rezoning that would allow us to have the 2 livable units on parcel, one primary residence and one additional living unit (known currently as ADU)?

You are buying into a business to pass down to future generations, not to mention a vacation home or retirement plan.When I talk about my investments I don’t talk about a 4 unit ugly building in (insert boring/cheap state in the US).I talk about Europe!