With this in mind, if you intend to leverage short-term debt (hard money), it's even more vital that your underwriting is thorough and that you have the correct systems in place to tackle potential issues.

However, within three days of moving in, one family member reported experiencing asthma issues and mentioned an unidentified smell.

Quote from @Jenna Kelley: The foundation is one issue, I agree with the other two comments..

I'm looking at a property in Lake Arrowhead, CA that obviously has a foundation issue.

If a guest refuses to leave, you will issue a formal notice to vacate and may need to pursue legal action if necessary.

I own a unit at a local condominium complex and am having issues with timely response from the HOA. 

I own a fourplex in McAllen, TX, and recently dealt with a major plumbing issue.

This normally would not be an issue but the cost of the water/sewer is extremely high in this area and specifically because the meter is a one inch, the costs are much higher than a normal 3/4 inch on a non-duplex. 

Always ask, and don’t be swayed by a sales pitch suggesting that the distinction doesn’t matter—it absolutely does.

This issue, if caught early, is probably fixable with out insurance involvement because the deductible might be more than the repair cost.