Whereabouts are you in Holland?
Probably cheaper and easier to buy a car or better still an old camper and drop down to the Ardennes or to the German Eifel mountains. Don’t obviously have the grandeur nor the elevation of the alps, but still more than much of the uk has to offer and definitely more than Holland.
Seems like a massive faff otherwise.
Pack bike, 30 mins (even with an evoc bag you pretty much have dismantle the bike). Get to airport 30-45 minutes realistically. Hang around for 60 mins prior to boarding. 60-75 min flight to destination. Transfer, again realistically best part of an hour. Check in to hotel, 20 mins. Assemble bike, 30 mins. Find there is a bolt missing….
You are looking at, at best I reckon, 4-5 hours before you even get pedalling.
Amsterdam to the Eifel/Ardennes is roughly 3 hours.
Plus of you have the freedom of being more spontaneous and can explore more.
A basic camper or van won’t set you back more than 2k (must be loads of campers…. more campers per head in holland than anywhere else). Reckon you would easily spend that on flight and accommodation within a few weekends.