Overall I love the R2 zoning route, but the permitting & construction costs alone will be tough with the budget you outlined in your post. 

We just got a deal under contract subject to the existing financing.

You don't have to answer that, nor can you because it's subjective, but the point I'm trying to make is that they may not view it as a great deal as it currently exists.

Another strategy is "Subject To."

Brandon Turner outlined this method in one of the older podcasts and there are previous posts in the forums.  

As you progress, maintaining a clear line of communication with your team, especially your property manager, will allow you to stay ahead of maintenance issues and tenant needs, keeping your operations smooth and your tenants happy.If you haven't done so already, consider outlining your goals and investment criteria with a property manager early on.

@Matthew Drouin I haven't even dreamed of doing what I'm talking about but research the subject I've been brought to various YouTube video offer case studies & case analysis which would have me to believe deals can be done by lone individuals without any capital of their own being spent.

You are afraid of rent control, but if you add an ADU and it is detached, the main house (if built prior to 1978) may eventually become subject to LA Rent Control. 3.

Where / How can I learn what neighborhoods in Syracuse and the surrounding neighborhoods would fall into those (subjective) categories?

@William Bohan as others outlined, there are several logical options, all with pros and cons (of course.)