You can rent a ventilator through the following channels.
1, you can buy a home ventilator, the price is not expensive. But it is less effective than the professional medical ones.
2, you can negotiate with some hospitals (generally small hospitals in towns and cities will have a higher success rate)
3, contact the ventilator supplier and sign a lease contract to lease. Generally suitable for long-term lease, the lease period often need more than a few years.