As accommodation is hotel with 19 floors antenna will be "random wire with radials" with ATU or "Loop" with ATU. (I will be on 19F floor's room !)
"Random wire with radials" with ATU worked well at hotel with 7 floors at Noumea in 2007.
I am testing following "Loop" with ATU.
As far as it is set on the ground I get good match on all Bands (7 - 28MHz) This type of antenna is very simple with good match without ground.