@Ko KashiwagiHi Ko,I hope to answer the question you are asking.I did qualify for the Triplex solely based on my W-2 which has since gone up a bit.Because I live in it, but the other 2 units are tented, I was able to depreciate 2/3 of all CapEx and OpEx (units are equal in size).The rental income covers about 81% of my monthly mortgage payment.One lender has told me, they need a 2-year rental income history on my taxes.

There are always cycles in real estate, but because of the size of the housing shortage, lack of new builds, and the largest economy in the country, it's hard to envision where we won't continue to see price and rent appreciation.

Another insights i am looking for is also the most optimized property size, is it 2 bed/1-2 bath or should i go bigger with 3 beds/2-3 bath?

Sounds like it will vary from lender to lender.Based on input so far, it sounds like I would need to decide on either doing a handful of 2-4 unit properties that are local so I can self manage, and use multiple residential loans, or a medium size property (whether mhp or not) which has professional management and would likely be long distance. 

This would be both a risk mitigation strategy as well as a bite size learning opportunity as I intent to manage close to all aspects of these for at least the short term (want to be an expert in the day-to-day operations before hiring this work out). 

Market OverviewThe Los Angeles warehouse/distribution market is comprised of 476.3 million square feet in eight geographic concentrations ranging in size from the 128.0 million square foot Mid-Cities submarket to the San Fernando Valley West submarket, which accounts for 6.6 million square feet.

If you don't, you lose out on a lot of income and there's a risk that Vrbo and Airbnb might drop you in their algorithms.When I built my cabins, I placed them on the right hand side of the lot so that I would have room to build a small pool house someday (about the size of a two car garage).

It depends on the size of each unit. 

Then you have the energy efficiency of the home, its size etc.

Reversible cushions. measure the room and make sure you pick a good size for the room so it isn't crowded.