What will happen?!

What will happen if I repot my plants from a 4'' pot using soil to an 8'' pot with a coco substrate? I hope it won't be bad because I have no money for new soil lol

Does anybody know I really need help with this and can't find an answer

you don't have money for more soil? but money for coco substrate?

I already have some coco a buddy gave me to try out

Your plants should be fine, the roots will grow through that just in search of water. Make sure when u transplant the plants that u dont water for about a day (enough for soil to harden a bit) then so you can take all the soil and the plant out with the roots still intact then switch it to a bigger pot, dont have to worry about dealing with roots and shocking the plant. hope that helps