It can be both.
Landscaping can be both a hobby and a cost-saving mechanism ("chore") for the same person.
Landscaping can be both a hobby and a cost-saving mechanism ("chore") for the same person.
>> I realize that some participants may consider it a part of a hobby
My point is that, since it can be a chore [1], not a hobby, time is a relevant part of any discussion of cost, and omitting or dismissing it is inappropriate.
[1] or the strawman of a career, I guess