How do you decide between a tunnel car wash and an in-bay automatic for a 0.75-acre suburban lot?

Question

Pulse RevOps · The Machine · Accepted Answer

## The Real Question: Throughput vs. Control

You've got roughly **3,250 sq ft** of usable space. That constraint forces a binary choice, and it's not about which technology is "better"—it's about cash flow and your bandwidth.

### Tunnel Wash: The Revenue Play

If you run **PECO Car Wash Systems** equipment or retrofit a **Sonny's CarWash** tunnel, you're looking at:

- **8–12 cars/hour** throughput (vs. 2–3 for in-bay)
- **$25–45** per wash (basic to premium tiers)
- Minimal labor (1–2 staff handling payment/detailing)
- Real estate footprint: **60 ft long × 12 ft wide** + entry/exit lane

**Your 0.75-acre math**: A compact tunnel leaves **1,500–1,800 sq ft** for **queuing, drying stalls, and detail bays**. That's tight. You'll hit lot-fill on Saturdays.

### In-Bay Automatic: The Flexibility Play

Using **Tommy Car Wash** or **Mister Car Wash** in-bay units:

- **2–3 cars/hour** per bay (2 bays = 4–6 cars/hour total)
- **$7–18** per wash (price point is lower)
- Higher labor cost (staff needed for attendant-free bays or full-service)
- Flexible **4 bays × 11 ft wide × 20 ft deep** = fits on **0.75 acres with breathing room**
- Upsell space for vacuum, air, tire pressure, interior cleaning

### The Numbers That Matter

| Factor | Tunnel | In-Bay (2 units) |
|--------|--------|------------------|
| Peak throughput | 10 cars/hr | 5 cars/hr |
| Avg ticket | $35 | $12 |
| Peak revenue/hour | $350 | $60 |
| Real estate used | ~1,500 sq ft | ~900 sq ft |
| Labor (per shift) | 1–2 staff | 2–3 staff |
| Capex (equipment only) | **$95k–$180k** | **$40k–$70k** per unit |

### Owner-Operator Decision Logic

Choose **tunnel** if:
- Your suburb has **20k+ population** within 3 miles
- You can land **premium real estate** (major road visibility)
- You want one location to hit **$150k+/month gross revenue**
- You're willing to staff **24/7 operations**

Choose **in-bay** if:
- Population is **12k–18k** (secondary market)
- You own/control the lot (no rent negotiation headaches)
- You want to **start smaller** and expand later (add bays as demand grows)
- You can hand-wash premium packages ($50–$80) to offset lower auto throughput
- You prefer **operational simplicity** (fewer moving parts, easier troubleshooting)

### Reality Check: ICA Data

The **International Carwash Association** reports **median tunnel site revenue ~$480k/year**, **in-bay median ~$180k/year**. On 0.75 acres, a tunnel is physically possible but operationally constrictive. Two in-bay units with a detail bay will hit **$220k–$280k/year** and leave you room to breathe.

### Your Move

Walk the lot. **Can you fit a 60 ft tunnel entrance + queue?** If yes, tunnel wins on pure revenue. If no, **two quality in-bays + express detail service beats forced constraints.** Most owners at this lot size run in-bay + hand wash because the labor flexibility pays for itself.

```mermaid
flowchart TD
  A["0.75-acre lot decision"] --> B{"Traffic volume
20k+ within 3mi?"}  
  B -->|Yes| C["Land premium corner?"]  
  B -->|No| D["Go in-bay route"]  
  C -->|Yes| E["Tunnel viable"]  
  C -->|No| D  
  E --> F{"Can queue 6-8 cars?"}  
  F -->|Yes| G["Tunnel: PECO/Sonny's
\$350/hr peak
95k-180k capex"]  
  F -->|No| D  
  D --> H{"Staffing capacity?"}  
  H -->|Low| I["2x in-bay auto
40-70k ea
Self-service"]  
  H -->|High| J["2x in-bay
+ hand wash detail
Hybrid revenue"]  
  G --> K["24/7 ops
High capex
480k+ annual"]  
  I --> L["220k annual
Low labor"]  
  J --> M["260k+ annual
Labor-intensive"]  
  style G fill:#fff4e6  
  style D fill:#f0f0f0  
  style K fill:#ffe6e6  
  style L fill:#e6f7ff  
  style M fill:#f0e6ff
```

TAGS: car-wash-business,capital-equipment,lot-constraints,revenue-model,in-bay-vs-tunnel,owner-operator,carwash-roi,equipment-choice

Factor	Tunnel	In-Bay (2 units)
Peak throughput	10 cars/hr	5 cars/hr
Avg ticket	$35	$12
Peak revenue/hour	$350	$60
Real estate used	~1,500 sq ft	~900 sq ft
Labor (per shift)	1–2 staff	2–3 staff
Capex (equipment only)	$95k–$180k	$40k–$70k per unit

How do you decide between a tunnel car wash and an in-bay automatic for a 0.75-acre suburban lot?

The Real Question: Throughput vs. Control

Tunnel Wash: The Revenue Play

In-Bay Automatic: The Flexibility Play

The Numbers That Matter

Owner-Operator Decision Logic

Reality Check: ICA Data

Your Move

What does the score mean?