@Corporate-Accommodations0
You have not seemed to have read and acted on what your guests have mentioned in their reviews re accuracy. One of your guests, whose review was otherwise very nice, pointed out all the inaccuracies in your listing and you have not corrected any of them.
You apparently have amenities checked off that do not exist.
Why does it say "Ski in-ski-out"? You aren't on a ski hill, right?
Go through the anenities list and make sure you remove what you do not offer.
I got the impression reading your description that English is not your first language. It is full of spelling and grammar errors and very odd expressions. Do you know what a "decent" bathroom means to a native English speaker? It means it is just barely acceptable.
So the first thing you need to do is find a native English speaker who can help you rewrite your listing info, clean it up so it makes sense, and fix the inaccuracies in your amenities list.
And what does "corporate" mean in your listing title?
I'm not sure what you are asking re "opening the calendar". You can set minimum and maximuum booking lengths in your settings and you can have your calendar open 3 months, 6 months, a year or more in advance.
And I would not advise you to take "long stays" if you mean a month or more. 2 or 3 weeks, or 28 days max, is plenty for you to start out with. And Airbnb isn't a good platform for hosts for what amounts to having a tenant, as opposed to a guest.