It’s still a worthy strategy to force cash flow that’s rare to find in SoCal, especially if you can reduce the cost of construction by doing a conversion/using an ADU grant or even buying a property with an existing ADU In general, even if the ADU valuation matches your cost including grants, they are usually not worth it in southern CA in single family zones. 

It included my real name, our real home address, and what was probably a Google voice number.

Their advantages include house hacking which includes better finance options and hustle.My last purchase was so large cash negative that the rents were $3k less than PITI.  

The important things to consider about HOA fees is that they usually include some utilities: Water/Sewer, Trash, sometimes shared amenities like gym, clubhouse, pool, and they are saving you the time and headache for property maintenance: lawn care, tree timing, roof, siding, etc.

This would include adding another bedroom and making it a full 2 bath.

Politely and clearly, make it extra clear that all information will be verified including income prior to the signing of any lease.  

I keep scans or pictures of all of all letters I send this way including the letter as readable before it goes into the envelope which includes the tracking number written on the letter, plus the filled out certified mail paper and the envelop after its addressed. 

Or the listing agent includes it in the property info on their website, or shares it when a showing is scheduled.

Include a lender in your conversations that specializes in working with investors.  

@Nitesh Chand Does your lease agreement with these tenants include verbiage for if you sell?