Simplify quoting, invoicing & job management for UK trades

About 1.0M UK trades and small service businesses (market size $1.10B = 1.0M x $1,100 ACV) routinely juggle paper quotes, manual invoicing and fragmented job management, which drives technician downtime, billing errors and slow payments. These pain points are acute for sole traders and micro-SMEs where admin eats into billable hours and reliable cashflow determines survival. You could build a mobile-first platform that unifies quoting, invoicing, scheduling and payments with AI-assisted estimating (OCR from site photos, LLM-driven line-item generation) and PSD2/open-banking reconciliation to reduce admin and accelerate receipts. The timing is favorable: mobile adoption among field teams, maturation of OCR/LLM tooling, and banking APIs materially lower product and integration costs, which explains the market score of 90/100 and revenue potential at 88/100. To stand out, focus on trade-specific workflows (plumbing, HVAC, electricians), an offline-capable UX, deep payments and supplier integrations, and a simple, transparent pricing model near the $1,100 ACV. Strengths are a measurable $1.1B TAM and clear ROI per customer; challenges include medium competition, non-trivial integration and compliance work, and the need to control customer acquisition and churn to make unit economics work.