Of all the things I have done in my life, achievements etc, money, academic, career they are a piece of paper at the end of the day, if there was one worthwhile thing I have done that would be to raise happy healthy well-balanced kids. I could not imagine life without my own family.
Yeah you have to give up a lot of things, but kids also put you on the right path in life. You have a mortgage, stay in the same house for years, work the same job etc feel like you are not going anywhere, but they grow up so quick when you look back you go shiz where has the time gone.
As for money hacks, got heaps. Our annual family holiday is usually Byron in the middle of winter, mostly done with FF points as I max my card out and pay it off every month, drive older but reliable cars, or avoid driving if possible. Ride a bike to work to avoid petrol/parking or public transport. Bring my lunch in everyday or buy from supermarket, rarely buy take away coffees ($1000 per year if everyday), use a phone 3-4 generations old (just bought a near new 6s for $230), never go to restaurants (except for special occasions), don't drink alcohol, don't gamble, avoid expensive entertainment, shop at Aldi mostly, stick to a budget, the list goes on, but still live the best life ever eat well stay healthy especially if I can get on the water regularly for a kite.