Google search gives me these super wide ranges and mostly talking about adding a bedroom in a SFH, which I'm not sure if applicable to this situation of "moving/subtracting a bedroom from one unit and add it to another unit in a duplex". 

In addition there are areas in Los Angeles that have stricter rent control than the state wide rent control.  

At the same time, I would reach out to that STR owner to try to get him to fix the nuisance issue.That said, even if you are successful in staving off the issue for now, it could come back at any time based on the current board members or on wide community support for getting rid of STRs.You could try to gather support for changing the covenants in your favor, but my gut is that that will be hard to do. 

They need a wide berth.But, the good part is that we have a blank slate to work with.

Are there programs to look into either state wide (NJ) or nationally that will help with down payment assistance or a construction loan?

. :)As a company, BP has wide reach now which brings a lot of spam and right now they can't keep up.

Since I am a Bounty Hunter, most time I have my thigh holster, badge on said holster, handcuffs, and city wide radio.

If you happen to fall under category 3, chances are you will hit a home run and out perform LP investments in syndications by a wide margin.

RoofstockRoofstock allows you to browse a wide range of rental properties for free, providing a valuable resource for finding turnkey investments.

Letting them know you’re casting a wide net can motivate them to find stronger deals to stand out among your options.