You can partially lace the wheel just using the non-drive side hub flange.

Lace in ~ 12 or 16 or 18 spokes (all the same length but it doesn't matter what length as long as they all reach the rim) then remove the freewheel by placing FW remover in vise, placing the freewheel onto the remover so all notches are engaged, then turn the rim like a bus driver turning left.