Hello gen9361

and a warm welcome.
It sounds like you're at a turning point in your life. As much as you love your D28, the BPD makes it difficult to like her or to want to keep giving and giving and giving when it doesn't really seem to help.
This part of your post stood out to me:
I need to break ties with her, take control of my life. I have been in therapy for the past 7 years. My husband and I are near retirement age and we can’t assist her monetarily soon. I am at my wits end. I love her but I don’t like her at times. I feel stressed and anxious. Any advice would help.
One of the "biggies" we learn about coping with pwBPD (persons with BPD) is that while we can't control or change them, there are many things that are 100% under our control, and when we change those things, we can change the relationship dynamic.
Like RRRJCCCN brought up:
I am in the same boat with my daughter, even the financial concerns, I can absolutely not help her anymore or risk losing my very small, older house, and can not risk messing up emotionally(to tired or stressed out) because I might lose my job.
I feel like I make progress sometimes in setting boundaries and it feels like she is kind of leveling out, and then BAM, she calls in a crisis, or mad at me for something I may or may not have done, or almost sounding out of touch with reality.
Boundaries are a big part of changing our dynamic with the pwBPD in our life.
Sometimes boundaries get misunderstood as "ultimatums to the other person". In fact, fortunately, true boundaries are 100% under our control, and don't require the other person to participate, cooperate, or agree!
We have a great
workshop on examples of real boundaries that has multiple examples of financial boundaries. Take a look -- does anything seem to speak to you right now?
Fill us in on how things are going;
kells76