Your purchase notes
Keep the details in one place.
Add the costs around the asking price: inspection, transport, preparation, storage and the work already known to be needed.
Use actual quotes where you have them and mark estimates clearly. Keep unknown costs visible instead of entering zero just to make the budget balance.
Plan the cost of your purchase
Explore your own cost-per-use scenario. Enter a realistic plan and include known extras. The result is arithmetic, not a claim about durability, performance or resale value.