You will need to look at CA building code.

Quote from @Hector Romero: Hello all, I am new to the community as well as being the lead in real estate investments.My sister and I currently hold 3 properties next to each other in Riverside County, California (we'd like to get them in an LLC but we're unsure how that may affect financing them).

We bought a place in Truckee, CA (Tahoe area) across the street from Donner Lake, a few minutes off I-80. 

To me a house hack will most likely work in Tulsa - I haven't done any research on that area, but as far as I know it's not a crazy market like places in California etc.Also read a lot, get some books from your local library or purchase some online.

From adding bi-fold doors to creating outdoor kitchens, we design spaces that make the most of Southern California’s weather.These trends not only elevate the homes we renovate but also ensure they stand out in the market. 

Buyer go to open house directly.We have this option in Minnesota now, and it looks like in 10 other states that I am aware of (California, Texas, Florida, Virginia, mostly the big population states).

I like umbrella because there is no worry of being pierced for inadequate separation of finances, if sued you have a heavy weight in your corner who has all the consequences of a defeat, and because usually it is reasonably priced (mine today is not so reasonably priced but I believe it is mostly related to the risks of CA).I do understand that the probability of needing the umbrella policy is low.  

But they were selling an expensive house in California and had horrible credit.

For example, let's look at the "Burger King".

Try Note Servicing Center out of California or FCI.