Not sure, I'm single etc. But I know my dad had retirement annuities which "forced" him to save and then pushed as much money into his bond possible. There's a few months where I remember him very stressed and we couldn't afford going to do monthly shopping (switched to weekly basically) and had to cut some stuff, but everything managed, even during the "savings" going off.
So it's possible.
It is possible. Our household is in a 1 and 1/2 income model. Simply, I am the breadwinner and my wife is self-employed. We took the approach of living as an 1 income family, forcing budgeting, savings, not spending on luxuries and pushing as much money into savings as possible (into a pretty complex portfolio balanced across multiple types of assets). We squeeze out 25-30% on good months, and about 15-20% in bad months. We drive 7 year old cars (no debt), bond is used for emergency fund (min 3 months of net income available). Shopping is done by looking through specials, making a list of the necessities (and yes, we do cater for those little luxuries) and also using the "rewards" cards where possible. Any 'big' purchases are measured on the basis of necessity or luxury. Amazing how many times something is what you want, but don't need.
now that I think about it, our income is 1 and 3/4. I have a second job which isn't permanent and pays quite well. It is done in the evenings once / twice a week (starting from July) with a bit of work over the weekends. Not stressful as it is something that I wanted to do for a while. That money will be going into savings and pay for the holidays. And we even budget for holidays.
The biggest trick to make this work is to ensure that everyone in the family share the same mentality to save and the finances are transparent. The talks are tough sometimes, but to be disciplined, requires a voice of sanity from someone else.
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. (ps i do not spend big) 
