Not sure what liquor regulations you would have - the church camp retreat doesn't allow liquor on the premises - the hot springs retreat they request you have your happy hour in your room but some do bring it to their machines in a coffee cup. Not me though as I prefer my wine in a stemmed glass and we use that 1/2 hour to relax in our room before dinner.
My friend has a stair climber and it's width takes up about 1/3 of the stairwell. It would be difficult to use that stairwell for bringing in suitcases etc. Hers also has a weight restriction on it, I think it's 250 lbs but that might be a concern if you had a guest that it couldn't accommodate? Hers was quite pricey to have installed and her stairwell has a landing part way up so you have to get off and walk the last three steps. She does "send up" her bottled water on hers
