Depends on how complex your MVP is. The problem for non technical people is that they probably don't know how technically challenging the problem is.
If it's a cat pictures site maybe a few months is enough to learn enough code to validate the idea. OTOH if you want to build a search engine maybe not so much.
If it's a cat pictures site maybe a few months is enough to learn enough code to validate the idea. OTOH if you want to build a search engine maybe not so much.