US public school physics PhD

1) There is a PI at my institute who is amazing. She doesn't have funds for more than her 2 current students.

2) My program is huge, and thus does not have the funds to support any PhD who doesn't get $$$ from their PI for research in the form of indefinite TA stipends. You are only ALLOWED to TA for your first 2 years. This is a huge point of concern for me: the only thing that kept me sane in my first year was teaching. I love it so much.

Given 2) would approaching her again with the following preposition be a legitimate way to work with her? 

Working with her as her student but also working as an adjunct at a local community college?

concerns I have:

 - this would make my PhD take longer than if I were doing research full time (although arguably more enjoyable for me given 2), not that I haven't loved my research experiences in the past, but 2-4 years without teaching sounds awful)
 - would I be able to (reliably, there are only a few colleges in our area/not a city) make $20-30k as an adjunct to stay on par with what I would make as a TA now?