The minimum provided to the guest for practicing his/her language with you is the accommodation. All other conditions related to the stay will be fixed in the agreement previously established between the parties.
As in the previous question, the minimum received for practicing your native language with the host will be the accommodation, other extras (food, excursions, collected ...) will be previously fixed in the agreement.
You will have to take this decision along with the guest since he/she is the one that will decide to stay longer at your home or not.
On the other hand, you should contact firstname.lastname@example.org because we will have to handle the increased duration of the insurance contract for the language stay.
From MyHOSTpitality we recommend a minimum of 2 hours per day. The total hours will be fixed previously in the agreement.
As the guest will spend some time at the home of the host family, it is preferable to give him/her a room of his/her own and, if possible, a bathroom to avoid having to share with other members of the house.