@Teresa2012
My question is have you identified a market for what your offering for your pricing? A lot of Hosts do have 28 day máximum because of local rules doable. A party of 8 guests for a month vacation is a restrictive market. You have a beautiful property, but you have to target the intended market.
You want to generate general internet searches also. general internet searches will display Airbnb listings because Airbnb is high traffic\.To rank on their search engines you need "Keywords"
Use photo captions, your ad, and create guidebooks.