For Raivola: it's twice as close to St. Petersburg, there are more entertainment options, a swimming pool, quad bikes, horses, and it will be much cheaper!

The difference in distance from the city is 20 km, not twice as much: 84 and 64...

In the Aurora townhouses, the minimum difference compared to single or double rooms in Raivola, if I understand correctly, is:
- Aurora for 5 nights with prices in Breeze, Lagoon, and Cape is 27000/5 people = 5400 per person, and in the Reef and Shell hotels, it's 1.5 thousand cheaper per person (4 thousand).
- A double room in Raivola, calculated per person without meals, with the minimum room price, is 2100/2*5 = 5250.

There are also plenty of entertainment options in Aurora...

Moreover, it's possible that the organizers will be able to reduce prices.