Are you going to manage it or you mean a team of professionals that aren't really a team? 

Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

The AC installer company said the reason is the Inverter motor which government asked to change all AC to have this motor to save energy.

The response I received from the PM was that it's due to recent legislation where she's seen "professional" tenants take advantage of recent tenant protection laws that allow them to stay in the property without having to pay rent for the term of the lease. 

Multiple, billion dollar companies are investing heavy in our area, such as Intel, Google, and Amazon.

Please provide the necessary documentation no later than [DATE/TIME] or confirm your intent to terminate the current lease and vacate no later than [DATE/TIME]"That's a very simple example, but gives you an idea.I also recommend you make tenants responsible for improvements, that they be at tenant cost, and that installation and/or removal be done professionally with receipts as proof.

Wanted to get into STR's and have since started a STR management company.

Start low if possible, offering yourself to the companies, and listen a lot of podcast from people that did this.- Partner is always better, but to put your name out there you have to do it yourself.

When tenant leaves, the filter becomes property of the landlord or the tenant must pay to have it professionally removed and provide receipts of evidence. 

Other facets of the job (such as dealing with title companies or lenders) are more manageable due to the fact that they usually operate during “normal” business hours, but if you work elsewhere during this time period getting things done might become quite difficult.