What CMS can be the cheapest way to pull an online store?

Question

CMS

The essence of the question is this: it took about 30 different stores to be made, and as cheaply as possible. Usually we work with Opencart, however, stretching it is not cheap for a store with a total cost of 25 thousand rubles.
CMS requirements:

• Finishability (no SAAS CMS is suitable)
  
• Simplicity / cheapness at a stretch
  
• Preferably working in PHP
  
• The presence of modules like a filter by parameters
  

PS You shouldn't ask why make 30 stores (when you can make 1 big store), because the wording of the problem is exactly that and will not change.
I will be glad to your answers!

Answer 1

Initially, any html + css template is already 95% stretched on modx.

Answer 2

on Wordpress of course))

Answer 3

Сs-cart Multivendor

Answer 4

php shop

Answer 5

Well, for 25 rubles, even a shkololo won't pull :) And in the case, what kind of joomla or wp?
Need an online store. I recommend Opencart
By the way, here is a good site for learning Opencart on your own