The person who says a plan is too expensive has given the group useful information.

Saying a plan costs too much takes more nerve than it looks, and the reaction is often mild annoyance at the person who broke the mood. But they have just told you something true that several other people were also thinking and not saying. Groups routinely drift toward the budget of whoever is most comfortable, and the ones who cannot follow simply become busy that weekend.

When someone raises cost, treat it as the useful signal it is and ask what would work instead. Thank them plainly, since they took the social risk for everybody.