It was built in the 2010s and located in an established neighborhood with convenient access to schools, amenities, and major transportation routes.

The flyer you linked is about food safety rules by the Department of Agriculture and states they only allow true service animals in food establishments.

It's all a part of the game. 

You will need to compile a convincing case as to why the cities established maximum blockface density should be exceeded in this instance.

Either would be a great option; I'd probably choose Roseville because it's more established, but the City of Elk Grove deserves a lot of credit for its impactful growth programs, so it wouldn't be a bad option. 

I am new to the game and using the FHA loan has just seemed to be the most common way to house hack (at least in terms of what the resources I have read have said). 

When you are new to the game, agents, wholesalers, other investors, and even you can push you around.

I can tell they are both on top of their game.

I would get back to local real estate investor meetups so you can connect with locals to the area and kind of get back in the game slowly that way.

Hey Jaxin,Congrats on jumping into the real estate game.