No.
You don't need a CRM. You need an SMS list and a countdown.
What's really going on
You're not tracking deals. You're building anticipation for two locations with an unknown open date. Every day you wait without collecting phone numbers is a day of free Instagram reach wasted. The 50-200 inquiries you mentioned are curious locals — they want a deal, not a relationship. Capture the number, send the launch text, convert to a membership. That's the whole game.
What to do instead
- SimpleTexting or EZ Texts (~$30-40/mo, check current pricing) — a dedicated SMS keyword. "Text WASH to 55555 for $10 off your first month." One keyword per location so you know which site pulled which crowd.
- A Linktree or one-page site (free) — the SMS signup, both addresses, and a "opening soon" banner. Every Instagram bio points here.
- Habit: one text a week until open, two a week the final fortnight. Countdown, behind-the-scenes photos, founding-member pricing that expires opening day.
Do this in the next 30 minutes: pick your keyword, sign up for SimpleTexting's trial, and put the signup link in both Instagram bios today. Hype dies if you wait for perfect.
What you're being oversold
Someone will pitch you Pipedrive or HubSpot to "manage your leads." Skip it — you have no sales cycle. A car wash membership is a one-tap decision, not a nurture sequence. Same with a full field-service tool like Housecall Pro; you're not dispatching techs. Every week you delay the SMS list is a week of walk-by traffic you can't text on opening day — and opening day is the only day the launch discount lands hard.
When to revisit this
When you hit 2,000+ subscribers or add a third location and can't remember which promo went to which list.
The part worth getting right
The one call: does the founding-member offer expire on opening day, or does it run 30 days after? Expire it day-one and you get a line around the block, cash upfront, and locals who feel they won something — but you lose the slow trickle who didn't see the post in time. Run it 30 days and you fill memberships steady, but the opening-day energy is softer and the urgency in every text before then rings hollow. Your two locations, your local market, your gut on how much buzz you can actually generate — that decides it, and it decides the wording of every text you send between now and open.