Waiting on a small chance

[housemoveslowmo]

We had an offer accepted on our dream house in October. All searches and surveys etc for us to buy theirs, and our buyers to buy ours done. They were going to go into rented. Then they realised rented would be costly and very limited available so decided they needed to buy.
They've struggled to find anything else, do appear to be actively looking. Had an offer accepted on another house in jan, but it failed survey and fell thru. They want a certain area and so are limited on a fairly small market. My buyers are end of chain and waiting v patiently.
It's now April, they still haven't found.
I'm starting to struggle a bit with the unsettling feeling of not being committed to the house I'm in but if this new house doesn't work out we won't move and will extend, so it's all or nothing for us. I love this new house and REALLY want it. Extending can't offer us quite as much as the new house, so def second choice. We won't consider any other houses.
How long do we wait? Do we wait indefinitely?
DH thinks we should set a deadline of a month or so,no progress and we bail.

Aibu to want wait it out (Indefinitely!) because a small chance is better than no chance?

Can you not rent?
My sale fell through in January due to a similar predicament. The bungalow I was buying was supposed to be empty, bar a family member house sitting. Except she was a sitting tenant & wouldn't move out. My buyer had already sold & was living with family, pending my purchase. My buyer got fed up waiting & bought something else.
I couldn't rent because I have dogs.
Is this something you can consider?

That would be risky, duchess, as there is nothing to stop the vendors changing their mind about selling altogether, or taking many months. Since plan B is to extend the house they're in, they don't want to lose that.

I’d give longer than a month.

We can't rent because we want to keep our house as plan b

If plan B is to stay put, I'd say that puts you in quite a good position. It may become more tricky if the buyers of your house get fed up waiting and start looking again

Yes, at the moment they seem happy to wait. They've paid for surveys etc, are currently renting, plus there's very little else at a similar price point on the market so probably in their best interest to wait. Although I'm sure at some point they will also feel that enough is enough. If they pull out I won't remarket, that will be the end of the road.