Hi, i am a SAHM with three little girls.....my husband is a firefighter, so works shift works - works 2 days 2 nights, 4 days off. I am beside myself when he is at work on those two days - so i really feel for you having to go thru the whole week !!!!. DH has a 2nd job (motorbike business - which allows me to stay at home ), so whilst he is at home in the garage, he is busy.
Mothers group nor playgroup were for me either....i found if i know what im doing week to week, the boredom passes....(although for me, its not boredom, its having adult convos....!!!)
Monday - swimming + our day out with my mum
Tuesday - housework day....kids play outside - paint, trampoline, get messy
Wednesady - kindy day, shopping day
Thursday - day at home
Friday - kindy day, shopping/coffee meet up day


I would seriously suggest gym membership..or......do you play indoor netball, a lot of centres these days also have childminding facilities.....?