Describe the travel pattern clearly
Regular commuting
Estimate the actual days and routes, including both directions. A month-long reservation should be compared with the amount of travel you really need.
Occasional longer journeys
Discuss outstation use before booking and include those distances in the allowance estimate.
Passenger and parking needs
Choose the vehicle for daily cabin access, luggage and available parking at the accommodation. A large car may not be the simplest long-stay choice.