For owner-operators and brokerages under $5M GP, a mid-market TMS like Tai, Turvo, or MercuryGate ($2K-$8K/mo) beats custom builds — the $220K+ build cost never amortizes against the margin. OTM is only justifiable above $500M annual freight spend or when global customs + multi-modal orchestration (air, ocean, rail) must tie into SAP/Oracle ERP. Custom TMS/WMS builds pay off around $25M-$50M GP, or earlier when lane-pricing IP, proprietary carrier scoring, or specialty vertical (temp-controlled pharma, oversized, hazmat) drives margin — break-even vs MercuryGate lifetime cost is typically month 20-28. Above $100M GP or 50K monthly loads, custom wins on workflow speed and dispatch-desk throughput — documented 25-30% load-per-dispatcher gains.