Hopefully under 400ff per person for dinner. Try the Domaine de la Tortiniere in Montbazon, just outside of Tours. The owner is a wonderful gracious woman and they have an excellent kitchen. It is also a beautiful place to stay.
Family run and on the bank of a river.
Look it up in the red Michelin, under Tours, in the suburb section. I cannot tell you how wonderful the owners are and what a special time this would be. It is a Relais du Silence, set in a park. Give it a try. Hopefully under 400ff per person for dinner.