Not in a million years would I have the appetite to take on that kind of risk in the 20 day window.

Our little town has 5K inhabitants yet has 5 "white table cloth" restaurants, including one which made the "top 10 desserts" list in Bon Appetit magazine this year.We have an 8 screen movie theatre, although a lot of movies that I want to see I have to drive to Austin, or wait for Netflix.

If you and your investors have the appetite for risk to buy in south america, eastern Europe of the middle east there is a strong chance you could double, but I also feel most of those areas are unstable and the 'rules' that make America such a safe investment are much looser in those areas. 

I'd recommend networking with as many buy and hold investors as you can there and seeing what kind of appetite they have. 

Be sure there is a large demand for a bonus room before you spend a dime.2 - grab at least five RANDOM samples/opinions to get an idea of the general appetite for your offer.

Suppressed sale?

well I subscribed to bigger pockets in 2012 can't believe it's been that long ago..but been to busy well it's 2015 and I forgot to post that in March I purchased a 4unit building and from reading my profile it's seems that I'm on my way  now I'm looking at a 6unit building it seems that my appetite is getting larger  but good deals are scarce so it's time to amp up the sales techniques and start to diversify my thinking. 

There is some serious market fragility in lending right now as the secondary market is losing its' appetite for this loan product, and wants loans it views as less risky, in addition to a pull back on loans specifically for STR properties.

Also, when purchasing multiple lists you always want to "apply suppression".

Once you get a good feel for the market and established a good foundation of cash flowing properties, then would suggest going a little more riskier route if that's your appetite.