Hello allI've always enjoyed the idea of having a bonsai, I have been offered the potted Acer as photographed. My problem is, it is much too large for us. If we could reduce it drastically, I would love to nurse something from it.I am a complete beginner and know very little, you have probably already realised this!I was wondering if this could possibly be reduced enough and in your opinions, what could I do with the multiple trunks? I understand this is not desirable but still, I would like to do something with it.Hope you can Help .

Hello!
That's a beautiful young tree.
Multiple trunks is a style itself, "Kabudachi".

Maybe the tree is tall at the moment in order to thicken it, so yeah, it could be reduced, BUT, what I've seen, is that clump style trees tend to be a big bigger than general...

I have no experience at all with Acer, but I think that if you live where they are native from, you should have no problem having one.

Is it possible for someone to mark where the reduction should take place. Is it not recommended to remove too much. That's what I've always been told.

Should I leave in the pot or repot in a smaller pot first?

Too me it looks like two trees in the same pot. I would dig out the trees in spring and see if that is the case.

Anyway, Acers can be cut back quite drastically, even to a bare stem and bounce back vigourusly. Where to cut is up to the artist and is based on own opinion and final goal for the tree.