Well...
That is very noble of you, however since the laser dye is dissolved in the ethanol you might not be pleased with your wife turning fluorescent pink (I dont know your tastes, so you may be ok with that).
Seriously, feel free to give me a ring if you come to the island- if you can get to the summit I could arrange a tour of the scopes. Some car companies will rent you vehicles that you are allowed to take to the summit... (MUCH cheaper than taking one of the rushed and crowded guided tours! and the guided tours dont get you inside the observatories)