Hoping to start bjj in few months when my kids get back to school and I get some money put away. If you had to pick sind bench marks to work towards for flexibility for bjj what would they be. Just looking for a few goals to add into my routine to help myself when I'm finally able to get started 
Stretch your groin, homie. The guard is everything. There was a rumor that tenth planet won't even let you be a black belt unless you can touch your knees to the floor in a butterfly stretch.
Hamstrings are important too to prevent back injury. It sounds weird but it is 100% true. 