I think there is room for a sf that takes stock replacement tubular control arms. I wish I could have gotten one of WD's last frames that takes DSE parts..too late now though!
3k sounds a little pricy for a bare frame...I beieve Wayne was selling his in the 2k range. Wil he be TIG welding the frames...I think it's expected at this price.
He should look into doing a front steer rack and splined sway bar.
Good luck with what ever you decide!!