Exporting content from Squarespace to WordPress

Does anyone here have experience exporting about 5-6k blog posts/pages from a Squarespace site to a new WordPress install? If so, any tips or tool recommendations? Or would you be available to offer support on this portion of the project?

A few notes:

• most posts only have one image, some also have an image gallery (3-4 images)
• blog posts have commenting turned off (there are no comments)
• no new content will be added to the site moving forward
• do you know if the urls can be preserved during migration?
• site template id is: 57861367725e252062509138

Thanks!
Jes