Is it permissible to make money quickly for capital through means containing some haram elements (but not major haram like gambling or similar) just initially to later fund a fully halal business? As the halal business will need enough capital to be set up. This is a necessity ya ustadh.

Ustadh AbdulAziz al-Haqqan

Your question is general, therefore the answer is general as well: no, it is not allowed, because the ends do not justify the means. If it is something that is allowed or favored in Islam, then you take the lawful means; it is not allowed to take the prohibited means.