unless there is some favorable conditions , i have no idea if this plants are suitable as ornamental house plants. specially with how expensive these plants can be.
PKs. for me are easy but slow growers in my greenhouse, i got 4 plants, (all different), first one being around in my greenhouse for almost 2 years, it is now produced roots, the other plants that came with me from Peru (nov 2013) are sending roots. all of them.
however for other people in Mexico, PK are actually hard, i gave 2 PKs to 2 different people, and both died.
in 2 month window , both plants were adults. not rooted plants.
mine are growing in between of Phalaenopsis and cattleya light level. so it is bright but not direct sun.
all of them are contantly moist 5 out of 7 days, the other 2 are more in the dry side, but always with 60+ humidity.
before that i was doing wet plants 24/7 , but it seems that this way is promoting root growth, i found this by accident, because the water pump feeding water to them died.
Antonio.