The tenant had disclosed he owned one mature boxer.  

Also, the UK is very much an exception to the rule as identity is checked in most European countries with national identity cards.

FIRST establish your investor identity; what type of deals do you want to get involved in (flips, wholesales, buy & hold, rent to own, etc), what type of property do you want to invest in (single family homes, multi family, commercial, etc), what's your risk tolerance, what sort of returns do you expect to get, do you want to be hands on or make it as passive as possible, etc.SECOND pick a strong market based on it's ability to meet your investor identity and based on strong fundamentals like I mentioned above.THIRD put together your team in that market.

Someone who was an only child sometimes has difficulties in adapting to understanding the public good, usually they mature into society, some don't.

Most commercial loans are 5 year maturities so having bankers around a property is very common.

If they give you a phone number for their work or supervisor, google the business and ask for the HR dept, instead of using the name and number they gave you.Any lies or discrepancies they give you are valid reasons to deny them.Pay for every single type of check you can do on them, credit/background/criminal/eviction/identity, etc. 

I want this second line to be effectively identical to a second cell phone.  

But, you can require proof of their identity and financial status, etc.

I sold a place in 2008 for $80,000, recently sold the identical property next door for $32,000, which is a 60% drop in value in 6 years!

For most people who ask about ARM's I dont necessarily say they are bad or good it just depends on the sophistication of the borrower/investor and their emotional maturity in handling the risk.Whether you should sell or hold or rent depends on what your objectives are so no one here can know enough to advise you on that from the scope of this article.