Migration can be a complicated process that almost always requires significant web developer expertise.  Most extensions have a well-defined process for migrating the content and functionality of your current site to Joomla 4

If you want to try to do the migration on your own, we can set up a development version of your site on the server where you can work on trying to migrate yourself.  The cost for that dev site is $25/month (or $250/year).  If you need interGen’s assistance once you get started, we would be happy to help at our hourly development rate of $150/hour.

We provide this information for transparency - we STRONGLY recommend you not attempt the migration without an experienced developer.