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I had no idea at all... so it's best not to "make a mistake", if you have to buy a modification, you risk opening a mortgage
Yes but once purchased we can use it in all the scene if we need so ... the plan is : do prologue and episode 1 with it for free to try, then if we have some patreons or release the game on platform or something that give us money, we purchase the assets used first to be "legal", then continue buying assets to continue the story ...
All will be dependant of the prologue and episode 1 cause if it's bad, no patreons, no support, no money.
If it's "good" enough to have support, we can afford these items and we will continue ^^
I don't know how others developers do their games, i'm not sure they "buy" all assets at the end, some will make the assets themselves ( more time but no cost ) and some will do like us.
Finally, it's the use of these assets, the rendering and the game in general who will be different from one to another....