Also, what type of property (turnkey or fixer-upper) / and your rental strategy (short-term vs. long-term)?

Should also check your insurance because some insurance will allow a roommate, some say you need the landlord policy even with a roommate.

If we purchases a home as an investment property, build a DADU, and sell the home and DADU (around 12 months after the purchase), what's the best strategy for tax saving?

Is that a strategy you use (driving for dollars) ?

If the breed of dog is an aggressive breed I will require renters insurance policy in some cases as well.  

I'm diving into this strategy and looking to see what's possible.

Interesting strategy, I'm not against it!

They may have higher insurance, maintenance, and/or property costs than you would - or maybe not, but I would double check their expenses if part of your hesitation is around the expense ratio.

You also have to consider your holding costs - you are paying HOA fees, insurance, and property taxes.

They’re typically quite affordable, so pick the one that fits your budget best.Using these strategies, you can maintain privacy and still meet the legal requirements for your LLC.