I think we should try option 4. The best for everyone is resuming where we left off so we should go for it. To get new GMs we will need a league file and reports so they can look at the prospective teams, and ideally an active forum.
For this we need:
The file/reports hosted asap
The file to me so I can prepare to sim, and some time for people to export
Once we have simmed just once I think we need to go for a recruiting drive, we need lots of discussion on the first sim to show we are active again
That should be enough to get things started, if we simply don't have the numbers to make it work we can use the hosting space to consider option 2 later.