Thanks for getting in touch! It is strange that an import would take so long. How are you currently running the import?
The import process from 3.x to another 3.x instance should not take anywhere near that long.
We have some steps that should get your 3.4 POC server up and running quick and easy.
Create a new 3.3 instance.
Run a database backup from your Octopus DB.
Restore the database to your newly created 3.3 instance.
Upgrade said instance to 3.4.
This method is the quickest and easiest method to getting your separate 3.4 server up and running.
If your import is still taking forever, could you attach your migration logs? (These can be found under C:\Octopus\Logs\OctopusMigrator.DATE.txt In a default installation)