Hire licensed and insured vendors.  

Quote from @Sanjay Bhagat: 1) Should I hire a third party accountant to interpret the deal sponsor track record for due diligence?

I am considering other options to see if there are ways I can hire someone to just do showing only and mamage my own rent collection through Zillow app, I also have my own contactors to do maintenance but have been paying monthly fee to my property manager who has done literally nothing, they also never answered my calls.It definitely sounds like you need to reevaluate your relationship with your property manager.

The next level up is hiring a revenue management company or VA to do this for you.

Since non-permitted work could impact insurance or liability, I’d consult local authorities, hire professionals, and confirm zoning compliance to ensure a smooth process.Good luck!

Or hire a professional who specializes in selling this type of asset.

CA's Secretary of State forms list the name and address of either a manager or member, so unless you're hiring a third party to serve as manager of your LLC, anonymity is very hard to achieve once filing publicly in CA.As to the probate part, you're right that going through a court probate is a huge hassle, including being expensive and time consuming. 

There's really not a cost-effective solution for utility monitoring for SFR, other than Nest.WhatsApp for business communications is lmited - how do you scale and hire someone to handle, while being able to track what they do?

And unless you have very deep pockets, you can't afford to be that much off....So as has been said....hire a very experienced General Contractor and have them give you a budget number based on your SOW, (plus they will find other things that need to be done that you will not have seen).On your succeeding projects, you do a budget yourseld first, then hire the GC and compare numbers.Then, eventually you will be comfortable going all solo...but it takes time.

I'm not an attorney, I haven't been hired to litigate damages and go back and fourth trying to prove or disprove who knew what when.