This clone is not intended for that. That is a totally different topic. You can try to make a custom pet that looks like a player and give it actions to support the players...I think that's the closest thing you can get from your request. You dont need to pay anyone for that.
For all quest initialized add
set Quest_finish, Quest_finish + 1;
and
if( Quest_finish > 3 ) {
mes "you can't take another quest";
close;
}
when the quest is finished
set Quest_finish, Quest_finish - 1;