OP: In case you come back, I really hope this school is great for your daughter and that things improve financially for your family.
Please know that when these threads get going, the responses often get off track and responses may not be to you, but to things other posters have said. Or to offer explanations. I don’t think anyone (or almost anyone) was inferring you wanted to kick another kid out of their single, but just that the school may not have that option.
Next year she will be a senior. Is this a school that guarantees housing all 4 years? Do seniors get housing priority and/or move off campus? If so, maybe she will get a single as part of the housing lottery.