Diane, I am sure you will get many excellent recommendations. One suggestion that I would like to make is that you contact Pat Hendricks Sensei at Aikido of San Leandro
(CA). In addition to having her own well-regarded uchideschi program, she has participated in the Iwama, Japan uchideshi programs of Morihiro and Hitohiro Saito Sensei for many years. Hendricks Sensei is a wonderful technician and person, and if you are serious about this undertaking (and it certainly sounds like you are), I know she would be only too happy to offer valuable insights into your options, and help you any way she can, as she has walked this very path herself.