Here is the estimated HTML table showing how the thrust and power draw of the submersible mixer propeller change with the speed of the seastead:

```html
<table border="1" class="dataframe">
  <thead>
    <tr style="text-align: right;">
      <th>MPH</th>
      <th>Thrust (N)</th>
      <th>KW</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>0</td>
      <td>3200</td>
      <td>3.2</td>
    </tr>
    <tr>
      <td>0.5</td>
      <td>2600</td>
      <td>2.5</td>
    </tr>
    <tr>
      <td>1</td>
      <td>1800</td>
      <td>1.8</td>
    </tr>
    <tr>
      <td>1.5</td>
      <td>900</td>
      <td>1.0</td>
    </tr>
  </tbody>
</table>
```

### Explanation of Estimates:
1. **Thrust**:
   - At **0 MPH** (static conditions), the thrust is 3200 N, as provided by the manufacturer.
   - As speed increases, the **thrust decreases** due to the reduced effective pressure difference the propeller can generate against the incoming water flow. The decrease is modeled approximately linearly to zero thrust at around 3–4 mph (5–6.4 km/h), a typical practical upper limit for such propellers.

2. **Power (Kilowatts)**:
   - At **0 MPH**, the power draw is 3.2 kW.
   - As the vessel moves, the **power draw decreases** because the propeller works with less resistance. The relationship is approximated to align with the assumption that power is proportional to the product of thrust and velocity, adjusted to reflect the reduced load on the motor at higher vessel speeds.

### Notes:
- **Assumptions**:
  - These values are **estimates** based on general propulsion theory and do not include real-world performance testing or detailed motor/propeller efficiency curves.
  - The **thrust decreases linearly** (but not strictly) with speed, reflecting the reduced effectiveness of the propeller as the vessel gains speed.
  - The **power draw decreases** because the mechanical work required to push the vessel is less than in static conditions.

- **Safety Margins**: It is advisable to include a **safety factor** when planning for propulsion systems. These estimates should be used as a **starting point**, not as final design data.

- **Further Testing**: For a precise understanding of the power and thrust curves, it is recommended to conduct:
  - **Field tests** with the propeller mounted on the seastead.
  - **Controlled laboratory simulations** to measure thrust and power at different flow speeds.

This table provides a practical basis for calculating power consumption and expected propulsion forces at various speeds for the seastead design.