Party fail or not (above question), my time is up. This was my very first tournament here and I enjoyed every minute of it!
My final score (total profit) is:
$57,101
Grats on being the first to post a score, Mionax. The fact that 3 out of 5 unique Sims showed up is out of your hands, so, no -- it's not a fail.
I think we have a misunderstanding - you do need to have 5 Sims at your party. The more you invite, the more likely you will get 5. If you don't get 5 unique Sims, then you would need to do the party over. But when you hit the end of the game (3rd Sunday 8am) then you use the current value of the house you are in as the selling price for that house.
If you ended in that same house, then your score wouldn't change, but if you moved to a new house and started improving it, that would not be within the rules. Since you finished before Metro posted his answer, it sounds like his answer didn't change anything about your game.
Please let us know if the house you referenced, where you held the party with only 3 Sims, was your last house. If so, you are fine, but if you went on, and included another house in your score then unfortunately we would have to post you as DNF. However, if you have a save file from that house, we are okay with you going back to that save file and continuing forward to complete the challenge that wasy