Costly

I try so hard to be low maintenance
But the harder I try,
the higher maintenance I become
I must accept my lot
and demand to fit the bill that's fit for me
I have a price
it's a simple fact
it stems from my value
as well as my lack
I am holy
I'm one of a kind
If I  could live off air I would
All the while doing good
Even the milk giver requires feed
So treat me as a garden and you'll get your fruit
As a weed and you'll come to ruin