Went by the Woodstore on the way home from work. They had some nice 12/4 Poplar sticks in the stacks. I picked up two for legs and long stretchers plus one 8/4 hunk for the short stretchers.
I'm getting too old to handle 12/4 wood even if it is Poplar. A photo of breaking the 12/4 down into something I can wrestle into the shop.
The new bench will be portable with a 380mmX1800mm slab. The slab will be laminated Beech, I figure about 15 BF @ $6 USD/BF, with waste the slab should be about $100 USD. The Poplar for the base was $275 USD and a Lake Erie 2X vise screw kit is $330 USD, $250 USD if I go for the standard screw. Add it all up and material to build is ~$700 USD. BTW, there ain't no money in building benches, it is a work of love or compulsion I'm not sure which.