File: contracts/codedestate/src/msg.rs
pub enum ExecuteMsg<T, E> {
    SetListForShortTermRental {
        token_id: String,
        denom: String,
        price_per_day: u64, // <-- here
        auto_approve: bool,
        available_period: Vec<String>,
        minimum_stay: u64,
        cancellation: Vec<CancellationItem>,
    },
    SetListForLongTermRental {
        token_id: String,
        denom: String,
        price_per_month: u64, // <-- here
        auto_approve: bool,
        available_period: Vec<String>,
        minimum_stay: u64,
        cancellation: Vec<CancellationItem>,
    },
}

File: contracts/codedestate/src/execute.rs
pub fn setlistforshorttermrental(
    &self,
    deps: DepsMut,
    env: Env,
    info: MessageInfo,
    token_id: String,
    denom: String,
    price_per_day: u64, // <--
    auto_approve: bool,
    available_period: Vec<String>,
    minimum_stay:u64,
    cancellation:Vec<CancellationItem>,
) -> Result<Response<C>, ContractError> {... snipped ...}

pub fn setlistforlongtermrental(
    &self,
    deps: DepsMut,
    env: Env,
    info: MessageInfo,
    token_id: String,
    denom: String,
    price_per_month: u64, // <--
    auto_approve: bool,
    available_period: Vec<String>,
    minimum_stay: u64,
    cancellation: Vec<CancellationItem>,
) -> Result<Response<C>, ContractError> {... snipped ...}
