i have read your posts starting from when you were thinking about buying the business.. only a few months ago..
i think you dh needs to give the business a real go. 12 months as minimum.. i think him changing him mind again shows he wont do what he says if you do sell up. he was a SAHD and didnt do it the way you were hoping last time..

$50 is a good amount to be better off. atleast he is contributing financially(you said he feels he needs to do)

no one can tell you what to do but i think if you keep doing only what he wants you may not get to far in life as he appears to just want to go back and forth between only ever working for him self or not at all