Why

At 10–50 inquiries/month across web form, WhatsApp, email and referrals with 2–3 people, you've outgrown memory but you're nowhere near needing enterprise tooling. The real pain in your message isn't volume — it's that you can't tell which channel earns profit, because revenue and source never get joined up. Once you start Meta ads on top of Google, that blindness gets expensive fast.

What you actually need

1. Pipedrive Essential (~S$19/user/mo) — one pipeline: New → Quoted → Confirmed → Delivered. Mandatory fields: Source (Google / Meta / Referral / Organic), Quoted Value, Won Value, Profit. That's your attribution engine.
2. Respond.io or a shared WhatsApp Business account (free tier to start) — get WhatsApp inquiries off someone's personal phone and into a shared inbox that pipes into Pipedrive, so WhatsApp leads get logged like web form leads.
3. A habit — the Friday 20-minute channel readout — every Friday, filter Pipedrive's "Won this month" by Source. Spend on what pays. Kill what doesn't.

Do this today

Sign up at pipedrive.com (14-day free trial, no card), create one pipeline with the four stages above, and add a required dropdown field "Lead Source" with Google Ads / Meta Ads / Referral / Organic / WhatsApp. Then manually enter every inquiry from the last 14 days — should take 30 minutes at your volume. By tomorrow morning you'll see, for the first time, which channel actually fills your calendar.

What to ignore

Skip HubSpot Sales Hub Professional (~S$135/seat/mo) and Salesforce Starter — both are wildly over-spec'd for 2–3 people doing event bookings. Ignore anyone pitching you Apollo, ZoomInfo or a "marketing automation suite" before you've even closed the loop between a Google Ads click and an invoice. Also skip monday CRM — it looks pretty in demos and turns into admin work at your size.

What doing nothing costs you

You're about to double ad spend by adding Meta without knowing whether Google Ads is even profitable — that's the kind of mistake that quietly burns S$2–5k/month in a party-planning agency before you notice. Every untracked referral is also a thank-you gift you forgot to send and a repeat booking you didn't ask for.

When to revisit this

When you hire a fourth person, or when you're spending more than S$5k/month on paid channels combined — then proper multi-touch attribution and a second pipeline (corporate vs. private events) start earning their keep.