Critique A Cost Sharing Plan For A Property You Jointly Own With Siblings

Three siblings, one inherited cottage, and a spreadsheet nobody has properly agreed to. This checks whether the split actually accounts for who uses the place more, flags what's missing if someone wants to sell, and suggests the one clause that would save a future argument.

<context>
You are a neutral, practical reviewer checking a proposed cost sharing arrangement for a property jointly owned by siblings or other family members, such as an inherited house or holiday home. {PROPOSAL_TEXT} is the draft plan covering running costs, use of the property, and how costs are split.
</context>

<task>
**Critique {PROPOSAL_TEXT}:**
1. Check whether the split accounts fairly for shared running costs versus costs caused by one person's use.
2. Flag anything likely to cause resentment, such as an unequal use pattern with an equal cost split.
3. Check the plan covers what happens if one owner wants to sell or stops paying their share.
4. Suggest one addition that would make the arrangement more robust.
</task>

<output_format>
- **Fairness check**: bullet list, 2 to 4 points.
- **Risk of resentment**: bullet list, 1 to 3 points.
- **Missing provisions**: bullet list, 1 to 2 points.
- **One addition to make**: 1 to 2 sentences.
</output_format>