Forgotten Tales

Is it possible to make quest items available in parts?

For example: bring 1000 stones

1000 stones won't fit in the bag, so can I bring 80 then another one, and make it one quest?

Because if a quest requires a lot of items, you have to write several quests in a row.
.
Also, this applies not only to items but also to gold.
.For example, I took a quest that required 5b gold, I would give 2b now and I will bring the rest when I have them.

I hope this won't happen and we won't have to give away 5 billion for nothing.

To answer the first question, this is already in the game at the Shai's Island questline.

About items: This can be done and this mechanic is already used in quests at locations -1.5 and -1.10.
About gold: Using scripts, you can create a counter of how much gold a player has brought, but at the moment this counter can only be shown in a dialog box or in notifications (Combatant has not added the ability to show this counter in the quest log).
I'm also not sure whether it's worth creating such quests. Few people want to see 0 gold in their account after paying part of the required amount of gold.