Thanks for still being there, it help me a lot 
I checked kitbash on few web sites and indeed it’s amazing and really cheap (my opinion) for what it is sometimes.
But 2 more questions are coming XD.
When you pay those kitbash, do you have to extra pay their creator for puting them in your game ? Also, is there any other key words for me to know instead of kitbash (or assets for example) to find some help to make my game? (In order to find some other purchasable/free resources, some software maybe easy to use and free). It could save me some research… Could be great