Hi Chara
Jenny is lovey person, and very caring, so staying with her would definitely have its upside.
It depends what she includes in her service, as well as the things you're having done at FT. Although FFS doesn't leave you incapacitated, it does leave you quite weak, so help is nice.
Also, if you have chin and jaw work done you'll not be up to eating much solid food for a few days. Your accommodation should have some self-catering facilities, or at the very least a fridge for smoothies and purée soups etc.