It's a mix where it's big tech empowering localized small business/people.

I am planning to rent out my unit in a mixed-use building.

I am looking to purchase a home with my sister in CA. We will both be on title and are planning to split costs and ownership evenly. \I intend to owner occupy the property while she will use it more as a second home. ...

It's obviously a mixed bag. 

An example of this would be mixing your personal money and LLC money in the same bank account.3.

Exploring alternative revenue streams, such as short-term rentals or mixed-use developments, can increase cash flow and diversify income sources.

Mixing STR and LTR can work in a building like that.

There are obviously a lot more factors that go into it - real estate is always going to be a mix of the tangible property/market itself with a mix with the investor/operator including experience, risk appetite, financial situation etc.I would say however if you are just getting started in real estate - LTRs are probably (in a vacuum) the better bet as STRs are certainly more sophisticated and challenging from an investor perspective

Less expensive (smaller) GC with mixed references.

Mixed usages, such as a furnished mid term rental of one unit or vacation rental usage (where permitted) is also an excellent way to boost revenue.