Comprehensive SharePoint Search Setup

I need a SharePoint search functionality that can search across all sites in my domain. The search should be able to include: – Documents – Lists – Pages – Any other content type available The search results do not need to be customized or filtered in any specific way… (Budget: $30 – $250 AUD, Jobs: .NET, C# Programming, Cloud Computing, Data Management, HTML, Microsoft 365, Sharepoint, Web Development)