I'd think about all the accessory structures you could build from that wood. Sheds, animal
shelters,
chicken tractors,
firewood sheds... things you could save money on by not buying the lumber. Many could be round wood timber framed, so no milling.
Joel Salatin talks about the value of having a sawmill and milling your own lumber. He cuts his own for
chicken tractors, and barns, etc... as he needs it.
I'll bet it's economical to hire in a portable sawmill, especially if you've got all that timber all at once to deal with, at a time when you have more to do than learn how to be a sawyer.
If you have some ideas ahead of time, you could set aside the choicest timber, at the right lengths, for those things. You might even seek out a sawmill operator to know what sizes they could handle, before you do your clearing/cutting/planning.