Hello,
Thank you so much for reaching out with us.
We have learn it in the depth. Here is our test:
1. Empty installation of WordPress and default theme https://prnt.sc/b4yl_Gvuthwe
2. Installed Elementor https://prnt.sc/w5sHQCJV39I5
3. Switched to XStore theme without content https://prnt.sc/FQhjUXQczZbU
4. Installed WooCommerce https://prnt.sc/MjiNOL11wbSi
5. Switched back to Default theme with Elementor and WooCommerce https://prnt.sc/fVinb1Vy9gmy
So as we can see the base and empty content work almost the same. In case as much content we add the more memory will be in use and its normal.
Next example:
If we will go to the subpage like shop with default theme: https://prnt.sc/Mgs56eTL56W2
And again switched back to XStore: https://prnt.sc/5Fq7LWIOjnzv
Conclusion: If we compare functionality of theme it will be 3-5x time more powerful. If we compare memory use it will take us 15-20%. In case you want to open 10+ or 100+ pages of customizer or fronpage its better to use more powerful server. And its logical. Hope after that deep test you will find your solution.
Ping us along the way if you have any concerns or questions.
Regards