Answering all four of your questions below 
— starting with the reframe that reorders your whole list:
The AI skill is the commodity. Anyone can prompt. The money never lived there — it lives in owning a channel + a boring monthly need. AI is just the cheap labour that lets a no-skill you deliver a service that used to need a team. So $2k isn’t a big launch — it’s 4 clients × $500/mo. Pick ONE unsexy vertical, deliver it 10x with AI, keep them on a retainer.
🥇 Highest staying power (your Q1) — GEO/AEO, the new SEO layer, still uncrowded
Customers now ask ChatGPT/Perplexity instead of Googling. If the AI never names a business, it’s invisible to those buyers — and few agencies currently sell the fix. That gap is your durable lane.
The offer: run a free “AI visibility audit” → show them they’re missing → charge to fix it + track it monthly.
Free tools to run an audit day one (no cost, no card):
├─ https://knowatoa.com — 60-sec multi-engine visibility scan
├─ https://www.hubspot.com/ai-search-grader — brand-perception grade
└─ https://ahrefs.com/ai-visibility-checker — citation check
Resell the tracking with a cheap tool (peec.ai / otterly.ai / rankscale.ai) as the monthly retainer.
Why it stays durable (not just a monthly dashboard): LLMs pull citations from a small, fixed set of sources — Wikidata, G2/Capterra, Reddit, Wikipedia. Plant your client there once = a permanent asset (this is “entity seeding,” and it’s the high-ticket fix you sell after the audit):
├─ Wikidata item (free) → https://www.wikidata.org/wiki/Help:Items
├─ Knowledge-panel → https://kalicube.pro/
├─ G2/Capterra citation play → https://parse.gl/blog/g2-capterra-optimization-ai-visibility
└─ Reddit citation-engineering → https://rctrl.com/blog/get-cited-chatgpt-reddit-forums-communities
🤖 The proven runner-ups + their exact FREE tool-stack (pick ONE, don't stack)
AI automation for local businesses — the biggest ready-made shortcut: thousands of free, import-ready workflows, no coding:
├─ engine → https://n8n.io/ · one-file AI kit → https://github.com/n8n-io/self-hosted-ai-starter-kit
├─ 10,000+ official templates → https://n8n.io/workflows/
└─ curated AI pack → https://github.com/enescingoz/awesome-n8n-templates
Sell review-requests + lead-follow-up automations to local shops (~$200–800/mo each).
AI voice agents / receptionists — sell to dentists, HVAC, med-spas (a missed call = a lost $500 job, so they pay):
├─ starters → https://github.com/VapiAI/examples · no-code → Synthflow/Retell
└─ free booking flow → https://n8n.io/workflows/8972-automated-voice-appointment-booking-with-vapi-ai-and-google-calendar/
Math the niche shows: ~$0.40/AI-call vs $7–12 human, ~$400–500/mo per client, ~10 clients ≈ $3.8k at 80%+ margin.
AI lead-gen (cold outreach as a service) → Clay copy-and-launch templates → https://www.clay.com/templates
📺 Content & products lane (faceless YT / digital assets) — honest take
Real, but audience-first = slower to first dollar than B2B retainers. Best as a second engine once a service pays your bills. Faceless-video + digital-product stacks (ElevenLabs/HeyGen/Gumroad) work, but you’re building distribution from zero — months before $2k, not weeks.
🧰 Best FIRST skill (your Q2) — it's NOT 'prompting'
The skill that actually pays = client acquisition + one delivery tool. Learn to (a) pick a niche and send 20 outreach messages/day, and (b) run one tool (n8n) well. That combo IS the business — the AI part is the easy 20%. Free build-and-sell path:
→ n8n community + working templates → https://community.n8n.io/
⏱️ Real timeline (your Q3) + the $2k math + where real numbers live
├─ Deliver-ready: 2–4 weeks importing/adapting templates (you don’t build from scratch).
├─ First paying client: usually 30–60 days once you start outreach (outreach is the bottleneck, not the tech).
└─ $2k: 4 × $500/mo retainers → then raise prices, not client count, to hit $10k.
See real, receipts-attached numbers (not guru screenshots):
├─ r/n8n (client $/mo builds + JSON) → https://www.reddit.com/r/n8n/
├─ Indie Hackers, Stripe-verified MRR → https://www.indiehackers.com/products?revenueVerification=stripe&sorting=highest-revenue
🌍 Rare edge — the arbitrage nobody mentions
Buy AI compute cheap and bill local clients the retail price. Self-host a billing gateway, plug in cheap model relays, resell the capacity as “your platform”:
├─ new-api (self-host AI gateway + billing) → https://github.com/QuantumNous/new-api
└─ Coze — no-code AI agents you build once, run for many clients → https://www.coze.cn/
🎯 Who's paying for this right now (the 'ohh, I could sell that')
├─ 
A dental clinic losing after-hours calls → AI receptionist books while they sleep
├─ 
A local law firm invisible when someone asks ChatGPT “best lawyer near me” → GEO fix
├─ 
A realtor drowning in lead follow-up → n8n auto-nurture on autopilot
├─ 
An HVAC company missing 30% of calls → voice agent + instant SMS quote
└─ 
A SaaS nobody’s AI ever recommends → Wikidata + G2 entity seeding, permanent
Don’t learn “AI.” Learn to own the pipe and rent AI as the engine — when the model changes, your clients stay.
!