You could tell them to cancel the listing and you will find someone else to list it after a month not 4 months (the market take is subjective too, all dependent on what your house has compared to others, where it is located, the size of it, and so many other factors).

Would encouraging longer stays realistically help reduce this, especially for a medium-sized cabin?

Depending on property size you can expect rents between $1500-$1850. 

Yeah the price is around 12k-15k for 7 people size.

Home was nice 4 Bed 3Bth under $550K with a decent size lot/yard and it only required 5% down as a New primary.Now I am not sure how big of a home you need but as you can see $100K covers much more in a scenario like that one above. 

I own a good size portfolio there.

Seeing as they have full utilities and stick built, they should be categorized as real property and have good value for their size.

Where are you doing most of your multi-family investing and what size properties?

There, you'll find detailed information on investing, both in general and specifically in Las Vegas.Before I continue, note that unless otherwise noted, the charts only include properties that match the following profile.Type: Single-familyConfiguration: 1,000 SF to 3,000 SF, 2+ bedrooms, 2+ baths, 2+ garages, minimum lot size is 3,000 SF.Price range: $320,000 to $475,000Location: All zip codes marked in green below have one or more of our client’s investment properties.What we are seeing:The chart below, from the MLS, includes ALL property types and price ranges.

Gross profit is interesting because it appears to just be the difference in his acquisition and sales price and fails to take into account the other obvious cost of running that business which includes, again according to him, the cost of over 26,000 letter print, mail, post, and the cost of the lists needed to create a mailer of that size.