Giving a good SaaS financial projection template is only possible if we understand the limitations of SaaS. These limitations are as follows:
1. Applications required fast response (milliseconds) are not appropriate. SaaS applications are slower as they hosted in the cloud
2. Customization is not easy due to the application architecture.
3. Integration to company sensitive applications/data is risky and can conflict with data governance regulations.
4. Changing SaaS vendors may be a difficult task especially if transferring exceptionally large data files over the Internet.
5. Adopting new software versions may mean unexpected training costs for the customer organizations and related user errors.
6. The user may lose access to their software and perhaps data, if a SaaS vendor were to go out of business.
7. Internet performance and reliability is still an issue in some countries or geo-regions.
8. Data security is always a consideration as data are being stored on the vendor’s servers.

Understanding the limitations here is a link that might be helpful for you: https://baremetrics.com/blog/saas-financial-model

Besides if you do have any questions give me a call: https://clarity.fm/joy-brotonath