Welcome to Connect, @cancerwarrior. There are quite a few conversations in the forum for situations just like this…needing longterm housing in Rochester for treatment. I’ve posted a link below to the most current discussion so hopefully be able to get some good ideas places to stay.

Long-term lodging options in Rochester while in cancer treatment
https://connect.mayoclinic.org/discussion/long-term-lodging-options/
With your husband’s MDS diagnosis, will he be having a stem cell transplant?