Hourly rates payable over milestone releases.
Provide clear requirements, Provide Dashboard/Report designs, graphics or contents, provide data for Dev. and acceptance testing
Provide effort estimates, Develop Power BI Dashboards and Reports, Test, Publish them as web link
After last payment, reports shall be delivered as .pbix files.
Either party can opt out with mutual agreements, with no obligations
I do not do custom reports or Power BI Embedded.