In such a case, perhaps it would be easier just to go with the basic D20 system and give out a basic set of stats that are usually given such as strength, constitution, charisma and so on. Since the rolling would require only you as the GM to do so and to look at it, I'm not sure I am a fan of it personally. This may be because I'm more used to doing my own rolls in some form or manner and it feels awkward otherwise but of course it wouldn't make sense for me to do so in this case unless there was a tool for dice rolling on the forum..