Be humble, be honest, be direct and HAVE FUN.

I am currently house hacking my primary residence in California and just bought a rental property in Indiana. 

Investment Info:Single-family residence other investment.

To be honest I have not thought that far yet :) . 

Honestly, hiring a lawyer might end up costing more than the process itself, especially if things don't go in your favor.I’d recommend approaching the neighbor directly to discuss it, making sure they’re aware of the serious safety risk.

@Mary Lopez I'm also a California resident investing the mid west. 

Investment Info:Single-family residence buy & hold investment.

Never had a problem with mine at my personal residence then again I'm sure tenants run it hard. 

And why is it that every single home - whether its a rental cabin or primary residence - doesn't have to have a sprinkler system?

Quote from @Donald Hatter: Pros:- Builders have many homes to sell at one time so it is easier to negotiate a better deal than with a home owner in the same neighborhood who is trying to sell their primary residence - Buyers bust out of deals all the time and builders don't like holding completed homes- Lower maintenance which leads to easier property management expenses.