@OP you can generate convolution filters for your daughter’s room yourself with REW (open source software, free) and the aforementioned $100 mic.
Then, instead of expensive roon or JRiver you can run Daphile (Linux-based, open source, free) on the same suitably minimally configured PC you would need to run roon on anyway, load your convolution filters in Daphile, and voilà.
Not sure about the cost of ROON these days but I bought a lifetime subscription 10 years ago for $450
It’s $830 right now.