Hi Oliver,
1. You can go as low as 2.5 USD monthly on VPS. If you want me to help you setup, you can use my affiliate link.
2. At the moment there is one option when migrating to new server if you have the same web server control panel you can do backup restore from there. Siberian is still developing an export/import options that can be very useful as apps backup/restore or as a template.
Best regards,
Ariv