While I can provide a general overview of the costs involved in build SaaS application, specific market cost data can vary widely depending on factors such as geographical location, the complexity of the project, the expertise of the development team, and the technologies used.

Here are some rough estimates based on industry averages and trends:

1. Development Team: Hourly rates for developers can range from $25 to $250 or more, depending on their expertise and location. For example, rates in North America and Western Europe tend to be higher compared to rates in Eastern Europe, Asia, or South America.

2. Technology Stack: Costs for technology stack can vary widely. For instance, using open-source technologies may reduce costs compared to proprietary software or frameworks. Licensing fees for specific tools or platforms should also be considered.

3. Infrastructure Costs: Hosting costs can vary based on factors such as the amount of traffic, data storage requirements, and the chosen cloud provider. As a rough estimate, monthly hosting costs can range from a few hundred dollars to several thousand dollars or more for large-scale applications.

4. Third-party Services and Integrations: Costs for third-party services and integrations depend on the number and complexity of integrations required. Budgeting a few thousand dollars for initial setup and ongoing fees for services such as payment processing, analytics, and communication APIs is common.

5. Security: Costs for ensuring the security of the application can vary depending on the level of security required and compliance standards to be met. Budgeting several thousand dollars for security measures such as encryption, regular security audits, and compliance certifications is typical.

6. Maintenance and Support: Ongoing maintenance and support costs are usually calculated as a percentage of the initial development cost, ranging from 20% to 50% annually. For example, if the initial development cost is $100,000, annual maintenance and support costs might range from $20,000 to $50,000.

7. Marketing and Promotion: Marketing and promotion costs can vary significantly depending on the target market, competition, and marketing channels used. Budgeting tens of thousands to hundreds of thousands of dollars for marketing and promotion activities is common for SaaS startups.

8. Legal and Regulatory Compliance: Legal and regulatory compliance costs can vary depending on the complexity of the regulations applicable to the SaaS application's target market. Budgeting several thousand dollars for legal services and compliance efforts is typical.

9. Miscellaneous Costs: Other miscellaneous costs such as office space, software licenses, and unexpected expenses should also be budgeted for, typically ranging from a few thousand to tens of thousands of dollars.

Overall, the total cost of build SaaS application can range from tens of thousands to millions of dollars, depending on various factors. It's essential to carefully plan and budget for each aspect to ensure the successful development and launch of the SaaS application within the allocated budget. Consulting with experienced professionals or development firms can provide more accurate cost estimates based on specific project requirements and market conditions.