I am not sure about the fee for Respite care, but the fees I pay for my husband's care in the CH is £203 per week, the fee is still based on emergency Respite until the Local Council changes it to Permanent Care which will then reduce, by how much I don't know yet. According to what I have read in other posts this is a very fair charge. We live in Perthshire, Scotland, and part of the fee is paid by the Council. We are getting off very lightly compared to others. George is thankfully, in a very nice CH with excellent care.
Have a nice few days away 1954 and well done to your SIL.
Love Margaret x