Update and redo, a couple of parts of the front and back of the site Festpir.ru in php Yii2 and Vue.js

Hello
We have a website Festpir.ru mainly on the php framework Yii2 a small piece of Vue.js. (expertise is important)
You need to finish / do the first stage urgently (before 1.02):
1. Prepare the front of the site for the launch of a new festival (cosmetic changes).
2. Redo to update several blocks of applications of participants on the front and back, to change a little the logic of the start of data collection
Second stage: (we will separately agree on the timing)
1. Make a number of minor improvements to the functionality according to the list.
2. Finish the block of formation and output of the program.
3. Make an analysis of the structure of the site, clean the code or modernize it, paint the structure of the site.
Please write what you need to get started and how much your work will cost.
Thank you!