Just food for thought. ;-) 

This is caused by the tenant and she should be charged for it.Mold requires to things: water and a food source (usually dust).

I have not house-hacked, so take this with a grain of salt, but I am thinking about it from the financial perspective, and it's analogous to owning a two- or three-family house, where you live in one of the units and rent out the others.  

That is why you must take with a grain of salt investors here who claim that they "forced appreciation" and their property is now worth "double."

When they get off work they just want to drink beer, cook some food, do laundry, take a shower and sleep. 

They will look at properties for us without payments because we are repeat customers putting food on their table. 

He has a team of people who research everything and they guarntee in writing that title is clear and there are no leins etc.I however wanted to ask all of you here what needs to be researched before buying a property at auction because I take what people tell me with a grain of salt, so I wanted to get input from more people.I understand buying property at auction has a greater risk because you can not inspect it and it is truely as-is, but people are doing it so I am trying to learn the steps needed to take before going to auction.

I always say you can tell someone's experience level, based on how salty they seem... just some food for thought! 

Sometimes you do need to take what you hear with a grain of salt, or else you will never buy anything.  

Food for thought - you'll also want to consider your tax strategy and reported income through the lens of your future plans.