Hello i am moving out to another home (rental home close to my office) and planning to rent out my current primary 4Br town home style condo (located in East bay area, CA) .

I know I am not the Realtor for everyone, I have my own style.

And every investment style has a different return/liquidity/effort/risk/etc. profile.

I'll look at any good cash flowing deal but I especially: groups of duplexes, ranch style properties, separately metered utilities, properties purpose built as multi (not a hacked up SFR), post 1950 properties, central AC, garages or carports, washer dryer connections in unit or building laundry, value add priced dated properties neighborhoods in lower tax areas, neighborhoods with no through traffic.

So YES, this is possible but you'd be limited to table funded local bank or CA based loan options who are familiar with ADUs or investment style loans if you want to refi once the ADU is built.

Once you are under contract and in your due diligence period, I recommend having a Phase 1 environmental study done (I've seen first hand what can happen when you skip this step), getting estopple certificates from each tenant and making sure you study the leases closely so you know what you are getting into, especially if they are gross leases and not NNN.

Specifically for legal fees (SEC docs), inspection costs (due diligence, environmental), etc? 

There are 2 or 3 different styles of keg tappers or sankeys.  98% of your kegs will use an American. 

The location and the modern style.

As long as your cabin checks all the marketable boxes you’ll still cashflow decently (cabin-style, hot tub, close to DT, view).