General:
* The upkeep of our old house is a constant challenge.
* Regular upkeep is essential to keep your car running smoothly.
* The park's beauty is a testament to the careful upkeep provided by volunteers.
More specific:
* The upkeep of this historic building is funded by donations.
* My monthly upkeep costs include rent, utilities, and groceries.
* The upkeep of the garden is a shared responsibility among the tenants.
Figurative:
* The upkeep of a healthy lifestyle requires constant effort.
* He needs to do some upkeep on his relationship with his wife.
In a question:
* What's the upkeep like on this apartment?
* How much does the upkeep of a swimming pool cost?