But what we've seen is that one strong month can essentially substitute a large portion of the annual income from a long term tenant.

I was also considering doing real estate and being a substitute teacher to provide some sort of income.

This is not a substitute for legal advice. 

There's no substitute for doing your first deal, and no amount of other learning can come close.

I have never worked a job for more than 6 months due to the nature of my life style which boils down to working field based biological research jobs spring-fall, and substitute teaching in public schools in the winter.

"Tax adjusted" means that you substitute the property taxes that the new owner will pay for the property taxes that the seller was paying (in many states those numbers can be drastically different). 

Hassle to start with one lender,  then get substitute trustees at least 2 more times. 

Most newer investors seem to think that hard money is a great substitute for no money.

"I'm a part time substitute kindergarten teacher and my husband sells sawdust out of the garage so we have a strict budget of $920,000 for the house." 

In fact when a performing note being used as collateral goes into default, the bank asks for a payoff or substitute collateral.