Open-source tools, tested in the lab.
Three obsolete office PCs, sixty bucks, and a copy of Proxmox VE. We ran a real home-lab workload on e-waste for 90 days, logged every watt and every failure, and found the exact moment cheap hardware stops being a bargain.
Invoicing, bookkeeping, CRM, and file storage for a solo US business, all running on one mini PC for 60 days. We tracked setup hours, tax-season friction, backup failures, and the real break-even against a $30-a-month SaaS stack.
A three-person office spent five working days on Linux Mint, and we logged every support ticket and hidden cost. The software was free; the labor bill was not.
We spent 30 days comparing a $40 router running OpenWrt with a $199 three-node mesh kit in a busy home office. The cheap box lost the coverage contest, won the bufferbloat fight, and forced us to put a dollar value on setup time.
We installed osTicket, Zammad, and UVdesk on the same $6/month VPS and ran the same ticket scenarios for a week each. Setup time, email ingestion, routing, SLA tracking, upgrades, and one messy recovery later, here is the pick for US small shops.
I replaced a consumer router with a $75 surplus thin client running OPNsense and tracked 90 days of real work-from-home traffic, video calls, VPN sessions, and power draw. The cheap firewall wins more often than I expected, but it also has a few time traps worth knowing before you buy.
We stuffed llama.cpp, Ollama, LocalAI, Jan, and GPT4All onto a $239 Intel N100 mini PC and measured tokens per second, RAM ceilings, and setup pain. Two of them are worth your time on this hardware — the rest depend entirely on what you're building.
Restic, Borg, Duplicati, and UrBackup cost zero dollars to license and several thousand dollars a year to operate. We model the egress fees, scripting hours, and untested-restore risk across three small-business scenarios so you can see the real number before you commit.