A quoted total is rarely a comparable unit. In our latest 99manos breakdown, a Spanish in-ground pool has eight measurable cost blocks, while general overhead, contractor margin, and VAT can turn direct execution cost into a final invoice using a roughly 1.4399 multiplier.
The marketplace lesson is simple: help customers define scope before matching them with providers. Excavation, structure, waterproofing, filtration, plumbing, electrical work, coping, and commissioning need consistent labels. Extras such as permits, municipal taxes, decking, fencing, and first filling should remain explicit.
Structured task creation makes proposals easier to compare and reduces the temptation to treat an incomplete low quote as the benchmark.