The $600,000 advance is likely to have a positive short-term impact on SGBX's stock price as it provides immediate capital to support growth without diluting shareholder value. The anticipation of a significant purchase order and the potential to secure an additional $700,000 advance further bolster the positive outlook. However, the exact timing and impact of the IRS refund and the purchase order on the company's financials are not specified, which introduces some uncertainty.