My opinion is no, as long as the support is conditioned on remaining stable and viewed as supplemental or temporary. It’s a good sign that she is able to work part-time. I was able to work part-time while unmedicated with supplemental support from my parents, and eventually came to realize I needed medication. My chief motivation was I was concerned I’d lose my job if I didn’t. Eventually my mother started charging me rent and I eventually moved out, and I started supporting myself and now own my own home. Although mine is an unusual and atypical case, my brother who has bipolar disorder and accompanying substance abuse problems did not follow this path— largely I think because too much help and enabling was given by my parents with little consequences.
This person knows what it’s like to be homeless, but anasognosia (lack of insight) is a feature of the disease, so it’s cruel to force someone back to homelessness thinking somehow this is akin to alcoholic ‘denial’ to get them to hit rock bottom. The disease doesn’t work that way. By the same token too much help can be detrimental too, as it was in my brother’s case. The only time I think this is appropriate is if the sufferer is abusive and/or violent and getting him/her to submit to treatment is not possible. In this case forcing a situation where the person is jailed or put into court required treatment (likely with injectable drugs) can be helpful.
I suggest also you and your friend look into the LEAP method as a different approach to address anosognosia. Here’s a video TED talk that describes how and why it might help. Good luck to you all.