Hello - another newbie

[goofy]

Hi all,

I am happy to have found this board. I live in the East Bay California. I've caught the bug and it doesn't seem to go away. It all started last December when my sister gave me an NOID phal as a gift. I was amazed that it survived my "care". Since then I got:
3 more NOID phals
1 dpts
a spider orchid
a heaven scent "sweet sugar" oncidium
a green lady slipper
a tahoma glacier
a white knight oncidium
another NOID phals that I "rescued"
a butterfly oncidium
a NOID dendro that may be a nobile.

I am a windowsill grower and I am running out of space.
All of my phals seem to be doing great. They are all reblooming with 2 or 3 spikes each. My spider orchid is having 2 spikes right now. My trouble is I have no idea how to take care of the butterfly and the dendro. When I read the info from the internet, it seems these 2 kinds need high humidity. Has anyone here successfully grow butterfly and dendro on the windowsill? If yes, what is your secrets?

Thanks for reading my long introduction.

T-