High cost of entry here, and I have found that most local lenders require 20-30% down with 6 months of reserves for expenses in case of vacancies.

This was a seller-financed transaction, the terms allowed us to use the ground as collateral and I brought partners in after I got all of the city approvals, and they took over the future expenses for the seller financing note and the other costs like engineering.

Specifically, a HH can substantially lower your living expenses, while increasing your income.

Someone who's looking to serially house hack in my area probably won't be able to do it in those very expensive/desirable areas, but they also don't have to settle for the really bad, crime-ridden neighborhoods either.

If you’re looking for suppliers for less expensive materials then you’re better off with a local reliable contractor.

Same goes for number of LLCs and what to fund them with, since bear in mind that CA tends to be more cumbersome and expensive to have LLCs than other states. 

LLCs are expensive and paperwork and publicly known.

No...different house....the more expensive one is different quality...all brick, different finishes, different appliances, different lot size, 30 year shingle vs 20 year shingle and so many other details.Dallas vs Collin County....two very very different places......take places like Frisco for example where most homes have been built in the last 20 years vs Dallas where very few homes have been built in the last 20 years. 

Some of your renovations can be expenses and some may need to be capitalized.

In my market, the multi families are very expensive and the SFH with the MIL basements usually pencil out better.