A problem could arise and you may not be able to weather the storm. 

Any big issues that could arise that people fail to plan for?

@Satish Vittalam i would suggest getting a property Management company to manage it for you , since you will be traveling for work it may become an issue especially when issues arise from your tenants.

Too many complications can arise (insect damage, rot, leakage, shifting off footing, and ultimately collapse if not consistently monitored and inspected) DO NOT buy the house without getting a proper inspection done on it first.

However  once they realise that's not what I am they are not difficult to manage (given that they were carefully selected in the first place).The real challenge and what may make it difficult to find a PM is the maintenance issues that may arise so we try and mitigate that by fixing up everything good  buying brand new when replacing appliances.

If a problem arises with the property you can 1031 earlier than usual as long as it's clear that your original intent was for investment.

It isn't something that just arises out of high debt or rising money supply.

Obviously though, some crazy stories can arise from these situations haha.

Mark - what problems can arise from parents?

According to Article 5 of the Third Geneva Convention:"Should any doubt arise as to whether persons, having committed a belligerent act and having fallen into the hands of the enemy, belong to any of the categories enumerated in Article 4, such persons shall enjoy the protection of the present Convention until such time as their status has been determined by a competent tribunal."