Hello, danielfink ,
Unfortunately, today to use 25 units, you should use 3 premium accounts with 10+10+5 units.
However, now, we are actively working on a new solution with extended limits where you will be able to create more than 10 units on one account.
Nevertheless, write to us at support@gps-trace.com with a link to this post on the forum, it would be interesting for us to chat and ask you a few questions, maybe we can be useful to each other.