Enterprise resource planning is the spine of every operations team that has outgrown spreadsheets but cannot stomach another seat-based subscription. After years of helping mid-sized manufacturers and service companies cut their tooling stack, I see the same pattern: a generic ERP eats six figures over three years, and the team still keeps a shadow Excel because half the modules do not match how the business actually works.
This article makes the case for a different route — a custom enterprise resource planning system built for your processes, delivered for roughly USD 10,000–15,000, that quietly replaces the parts of an off-the-shelf ERP that you actually use.
What enterprise resource planning really has to do
A working ERP does five things. Anything beyond that is marketing.
1. One source of truth for orders, stock and money
Sales, warehouse and finance read the same record. No nightly CSV exports, no “let me check with accounting”.
2. Workflow that mirrors the business, not the vendor
If your quoting cycle has four stages and three approvers, the system has four stages and three approvers — not a 19-step “industry best practice” template imported from a Fortune 500.
3. Reporting that answers questions in seconds
Margin per product line, inventory turnover, AR aging — without a USD 30k BI add-on.
4. Integrations with what you already pay for
Email, e-commerce, accounting, shipping carriers, banks. Two-way, real-time, with audit trails.
5. A UI your team will actually open every day
Mobile-first views for warehouse staff, dense tables for accountants, dashboards for owners. Not the same beige form for everyone.
Why off-the-shelf enterprise resource planning often disappoints
I have migrated companies away from three of the big-name ERPs. The repeating story:
- Half the modules are unused, but every active user still pays for them.
- Each “small” customization is quoted at USD 8–20k by the vendor’s partner.
- Year-three license renewals quietly increase by 7–12 percent.
- Reports the CFO needs require a paid add-on or a third-party consultant.
- The mobile app exists but the warehouse refuses to use it.
By the time you have paid for licenses, implementation, customization and a yearly maintenance contract, the off-the-shelf option is rarely cheaper than building exactly what you need.
Cost comparison: custom ERP vs licensed enterprise resource planning suites
Numbers below assume a company of 25 active users over three years. They are conservative — the high end of vendor quotes is significantly worse.
| Cost item | Licensed ERP (SAP B1 / Dynamics 365 / NetSuite) | Custom ERP built with me |
|---|---|---|
| Year-1 licenses (25 users) | USD 30,000 – 60,000 | USD 0 |
| Implementation & customization | USD 25,000 – 80,000 | Included in build |
| One-off build (everything you need, nothing you don’t) | — | USD 10,000 – 15,000 |
| Year-2 and Year-3 licenses | USD 60,000 – 130,000 | USD 0 (only optional support) |
| 3-year total | USD 115,000 – 270,000 | USD 10,000 – 20,000 |
The point is not that licensed enterprise resource planning is bad — it is that for many mid-sized teams it is dramatically over-priced for how little of it they actually use.
What custom enterprise resource planning gets you that the SaaS suite does not
- Code and data stay yours. You can host it on your own server, your own cloud, or hand it to another developer in five years.
- No per-user pricing. Onboard a seasonal worker for a week without negotiating a license.
- Workflow changes ship in days, not quarters.
- Reports built on your real data model, not a vendor’s generic schema.
- A mobile UI designed around your warehouse and field staff — not a generic web view shrunk to phone size.
How to start
- Map the five processes that ate the most hours last quarter.
- Decide which two are worth automating first — usually quoting and inventory.
- Get a fixed-price proposal in the USD 10–15k range, delivered in 8–12 weeks.
- Run it alongside the legacy tools for a month, then switch over.
If this matches where your business is, take a look at the rest of what I do at rsmobile.net — most of my custom enterprise resource planning projects start as a single 30-minute call.
Summary
Off-the-shelf enterprise resource planning is a fine choice for a 500-person company that wants someone else to be responsible for the platform. For most mid-sized teams it is an expensive way to use 30 percent of a product. A custom ERP at USD 10,000–15,000 covers the parts you really need, costs nothing per user, and pays for itself before the next license renewal arrives.
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