I made a couple mill in about 6 hours or so doing lvl 1 and 2 missions. For an alt that can only fly hauler types of ships and not doing anything when I am afk I don't think a couple extra 2 mill isn't bad. It probably would be more but when it has over 10 missions that it has accepted you loose out on the time bonus on a lot of them. If you keep your max missions lower to like 5 to 10 you have a lot better chance to get the time bonus.