It is not uncommon for tenants to run up utility bills to punish their landlord.

Specifically what you're looking for is any balloon payment (the whole amount being due at a certain date before the 30 years - uncommon for a regular mortgage but possible) and especially and adjustable rate language (usually covered in something like an "adjustable rate rider" toward the end).If the mortgage includes escrows for taxes and insurance, I'm not sure the #s add up - I'd expect the payment to be a lot higher.

It's just not 100% predictable on timing and so it's not terribly uncommon to have to extend a contract because a potential heir popped up or court dates were delayed. 

From what I have been told it is uncommon, however I have seen other posts on here where it has happened.  

Also, should we endure another market correction, atleast we would have the funds to carry out any mortgage obligations in the unlikely event we face increased vacancy (very uncommon in my area).

although like I said its not uncommon to reserve the timber rights.. you would get a better price on the dirt.. but its going to make your sales to homeowners a little tougher.. 

They aren’t uncommon in Las Vegas. 

However being quoted higher terms for out of state is not uncommon.

@Rose StuartNot all education is to be had at university, though sometimes the costs are the same.Being way off on your estimates is not uncommon when you are new.  

@Jared Simon  if you don't have a lot of free time or extra cash to burn on marketing wholesaling in So Cal is tough it is not uncommon for rental property owners to get 2-3 letters per week per property from wholesalers.