Rent 2 Rent

Hello, I am seeing an increase in rent 2 rent businesses in the supported living sector, where a business is renting a HMO and then looking to sub-let this to a social care provider. They are not housing charities or RPs so unable to get housing benefit cap exemptions without adding another layer. I wondered if others were seeing an increase in this too, if there are any concerns about this model, and any advice on how to make it work (if not concerned)?