SharePoint to Isilon migration

I need to migrate data from Sharepoint to Isilon , but we’re on a tight budget and all the popular tools I tried CloudFuze, AviPoint, and GoodSync turned out to be way too expensive.

Does anyone know any cheaper alternatives, free scripts, or lesser-known tools that actually worked for this kind of migration? I’m open to any practical suggestions that can keep the cost down.

Also, I saw Gs Richcopy 360 mentioned on some sites , does it support migrating from and to SharePoint? Has anyone used it for this before?

Any help or real experiences would be really appreciated!