Buying real estate is NOT a foreign affair to anyone from any country.

Report here:1.

There's also the possibility of becoming the squeaky wheel by calling the police (*not* security) to report the matter.

Here's a couple quick screenshots, I'll drop you a message to share a full report.

So I'd just make sure you have good checks and balances and reporting setup. 

I also noticed that tenants who are on DHS scheme usually have a higher turnover (e.g move in and out rather quick).As a foreigner, I have to rely everything on the property managers.

Liabilities and Credit Reports: If the wife’s name is not on the loan, she will not have direct liability for the HELOC on her credit report.

Tenant shall be responsible for any property damage caused by failing to maintain utilities or report utility problems in a timely manner.Tenant Utilities: ______________________________________________________________Pass-through Utilities: _________________________________________________________Utilities included with rent: ____________________________________________________Propane: If applicable, Tenant shall return the propane tank level to at least _______% upon termination.

The LLC is a pass through entity and will show up on your personal Schedule E and once the property shows up on the LLC, the debt (that probably won't show on your personal credit report) will be included in your total debt. 

If you plan on self-managing the properties, then you’ll likely need to register each LLC as foreign entity in state of CA and pay franchise tax for each one.