have you not got a lovely big vase that could take up a bit of the money say £50? and then make a really tastefull arrangement, you could fill the glass vase with limes etc to make it a bit more funky and then i would use bamboo, anthurium, protea, snake grass, aso, fats, and then put unopen lillies in so that she has something left to open, palm leaves. Or you could do two vases that join each other with grasses with one bigger than the other (i know what i mean - not sure if you lot could visualise). Or you could put a vase in a low glass dish and do an arrangement in the bottom and an arrangement in the top.

I know your dilema though, these are the customers we all want constantly but when we get them they really make us work creatively cause its gotta look worth it!