Just start by modifying KFM.
Few people will be willing to start up characters for you if the amount of work is promising to be high, especially if we know nothing of them.
If you're speaking about characters that require sprite edits, it will be even longer. If it wasn't, you'd see more characters like that around, wouldn't you.
If I struggled to the end of my determination, to the end of my way of life with my followers, if the result is ruin, then this ruin is inevitable. Grieve. Shed tears. But you cannot regret.