Durable Handicraft — ruling 1

You don't choose whether to pay {1} until Durable Handicraft's triggered ability is resolving. No player may take actions between the time you choose to pay and the time the creature gets a +1/+1 counter.

Durable Handicraft — ruling 2

You can pay {1} only once each time Durable Handicraft's triggered ability resolves. You can't pay more to put multiple +1/+1 counters on a creature.

Durable Handicraft : règles, fonctionnement et interactions (MTG)

Durable Handicraft is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Whenever a creature you control enters, you may pay . If you do, put a +1/+1 counter on that creature. , Sacrifice this enchantment: Put a +1/+1 counter on each creature you control.

How it works : Durable Handicraft

Original English text — Wizards of the Coast / Scryfall

#1September 20, 2016· Wizards of the Coast
You don't choose whether to pay until Durable Handicraft's triggered ability is resolving. No player may take actions between the time you choose to pay and the time the creature gets a +1/+1 counter.
No other card is named in this ruling.
#2September 20, 2016· Wizards of the Coast
You can pay only once each time Durable Handicraft's triggered ability resolves. You can't pay more to put multiple +1/+1 counters on a creature.
No other card is named in this ruling.