Very cool idea. Have you thought of connecting with a local school systems (ie. high school, college, university,etc)? Often students have service assignments or class projects which could provide walking partners for seniors and help students better understand the older population. Our research " Young and Old Together" highlights the benefits of inter-generational experiences.
The HealthCircle Clinics at the University of Colorado Colorado Springs have been running for 3 years. The students come from various educational backgrounds including: nursing, health promotion, nutrition, strength and conditioning, gerontology, psychology, and gero-psychology. Students apply for positions in the 5 clinics based on their field of study and then receive more specific training from the clinic/ program directors pertaining to their duties.
Intergenerational housing is an interesting concept. I can see the potential benefits and drawbacks as alluded to by the comments. Thanks for sharing!