Bowyer's Benches are pretty nice, not to hard to build. A quicker way of doing it is the 'Baker Bow Bench' a heavy duty bench with a heavy duty vise attached.
Used one for years, made several for fellas to use at MoJAM, they are still going strong. I used 2X10s for the bench and legs and a Harbor Freight vise.
Some like to mount the vise one riser, either made a big square beam or some 2X6s nailed together.
No single bench or shaving horse will work for all applications but the Bow Bench beats having to have constantly put pressure on the shaving horse pivot to keep the wood held in place.
Might just be my old knees that object to it, who knows.
Good luck on the construction project and upcoming bowyering. G.