Decide which game you want to play.

DSCR Loans are typically great for STR purchases - however, DSCR Lenders are going to require at least some "skin in the game" - so won't be able to have a 2nd lien for the down payment. 

There will certainly be buyers interested in having an ADU but I'm not sure they will be able to pay for the cost the original owner incurred to get the ADU.

You'll have to balance cost vs features!

Targeting, impressions, reach have been successful with Cost Per Results.

The cost of QuickBooks online doesn't justify our usage.

The one I am used to using provides cost estimates of various rehab products based on specs about the house.

A lot of these blogs I am reading are from out of state with very low cost of living so I think If someone from this area could answer this, it would be very helpful for me.So my husband and I are currently living in one unit for the past 4 years that is part of a triplex/multifamily property in Belmont Heights in Long Beach, Ca.

Some people are not ok with this.To get started in notes, there is a learning curve and upfront costs.

Surprisingly I think I like the SFR, (lower maintenance costs and tenant interactions per cash flow dollars).