Good for you for working now to get these things organized, while at least your sister can participate in the process. I know for sure that Pam Kruger of Wealthramp has vetted fee-only fiduciary advisors in the Milwaukee area, because I have asked her about this before.
Please follow this link on my website to get involved in the Wealthramp process. Pam personally supervises the introductions, at no extra cost to you. And please let me know about your experience.