Don't want to rent a car and drive, is there any other way to get to N. Hatley, specifically Manoir
Hatley except to rent a car in Montreal?
You could take the Limocar one a day bus service that stops at Ste-Catherine de Hatley https://limocar.ca/wp-content/themes/WpActiv… then take a taxi for the last km.
If not, you could take a Limocar service to Magog that sees much more service then taxi to destination
Rent a car... seriously!
Or travel by bus to Sherbrooke and rent a car from there: it is a 10-15 minutes drive. The Manoir is pretty isolated right out of North Hatley and if you want to go anywhere you will feel stuck.