Hello @DisEase
It's a difficult situation for you all, and a difficult decision.
As someone with lived experience I'd suggest the most important thing is to consult your daughter and involve her in the decision-making. Many years ago at 26 I lost my autonomy when my parents packed up and closed my flat after my first major psychotic break. It took a while to get back on my feet.
Your daughter may well prefer to remain independent and that may assuage your guilt. Or she may express the need for some support that you can negotiate.
Her financial situation and accommodation options, and availability of other partner, family and friendship supports will also factor into what is possible. But it's not a decision set in stone. Her needs and preferences - and yours - will no doubt evolve in the weeks and months ahead, especially as her treatment and prognosis settle.
You'll need to assert your own needs and perhaps those of her younger siblings.
I trust it's a conversation that's possible for you all. If it's likely to be difficult perhaps someone on your daughter's MH team can help facilitate it.
Good luck and best wishes.
Dimity.