Crabgrass, soybeans or other options?

I have about 13 acres that was reseeded last fall, came up but got dry and lost most of the stand. Maybe 10% stand, but lots of buttercup. Ground was prepared with a disc. Would like to seed something to get a hay crop this year. I just have  disc mower and tedder so no conditioning can be done.

 

Would like to follow it up with a permanent seeding this fall. What is one of the most fool proof options out there?

 

I here of people talking about multiple cuttings of the crabgrass, have one friend trying it this year so no knowledge of it personally.  People talk beans of beans and millet. Hear it is hard to dry down. Kentucky area.

Crabgrass, soybeans or other options?