Senior Living in West-Central IN

I’m looking for senior living (55-62+) on the west-side/central-west state of Indiana. My partner & I live in Coatesville, and his sisters live in Brownsburg. This would be for his parents; they currently live with us & frankly, it is awful. Any recommendations?
Preferably under 1k a month (or go by the 30% of income is rent deal), as mostly likely they would have to pay for it with our help as his two sisters are pretty hands-off, with one being a SAHW.