Thanks for the support.
I know that my T/Pdoc will avoid in-patient treatment for as long as safely possible. I also know from DBT group about a couple people she did send into hospitals. Both times the process took a couple weeks (no acute situation) and both went to different hospitals as she got them into the one that most fitted their needs.
Being from Luxembourg I'm lucky to have a wide range of possibilities: as long as my T/Pdoc does the paperwork any hospital in Luxembourg or in France, Germany and Belgium is paid for. So I have an incredible range of options.

I hope I won't need it, but will still start looking around a bit, maybe I'll fins something that could be helpful.