I am helping a client who is also a Veteran to do this exact thing right now; at first he wasn't sure he wanted to move twice to make it happen, but when he realized he was going to basically get a cash flowing rental property for free(no money down) he realized it was an easy decision.

There are a few Categories that I have broken into their own calculations considering there may be cost savings depending on strategy employed. 

Feel free to DM me and we can walk through it. 

Also since it takes so long for a response (most cases) did you have to resubmit your application?

Typically ADUs in SF zoned areas cost much more to add than the value they add.  

Way too costly. 

They might make you open some things up and it will likely cost you (really depends on how strict your municipality is, I would ask someone there for a better idea.)

Thanks Ty- Submitted a call in your schedule for 3:45 today or feel free to call earlier if you are free.

You'll need to put up 150k plus closing costs here to close on this deal. 

If you're interested feel free to give me a call and I can try to answer more of your questions.