To some being a sahm isn't a life being eked out but living life to the fullest.The benefits for many outweigh any negatives.
Op it's cutbacks,life planning and different priorities.
Op off the top of my head have you done the following:-
Got rid of 1 car(ensure it's reliable but no need for a new one with monthly payments)
Got rid of all dd you can eg Sky,phones etc(Freeview,payg Tesco phone and Netflix at a push are great)
Switched to Lidl(we only spend £70 a week for 5 and eat well)
Got a decent coffee maker(a cheap stove top produces fab coffee and cuts the need for coffee out)
Got rid of debt
Got a tent
Downsized your house as far as you can
Changed your attitude re clothes( nobody really needs hoards of new clothes every season)
Made sure you've got a few like minded friends
Got a library card(you can order brand new books for 50p)
Made sure you squeeze all errands into one day to save petrol
Cut the gadget addiction many have
Cut your water and electricity consumption
Got a decent pair of walking boots,found free places for entertainment and a NT card for your bday
If you've done all the above and the figures still aren't working than maybe it isn't.I may have left some out though.
We're nearly at the end and I'm looking for part time work the tax free salary of which will seem like a huge addition to our coffers after several years on 1 salary.I'll be career changing to something less stressful and a lesser job if you like but it's exactly what I wanted and planned for years ago.You only live once and I'll have had a career,time as a sahm and hopefully a part time job giving me life balance.I always wanted to have all 3.
Tbf though if you can wangle going back part time I'd aim for that,might be easier than trying to break in to the part time market later iykwim.A part time job is the ideal scenario imvho. You get the best of both worlds.