Do u think with 14k gross, and with aim of saving 5.5K zloty , me and my wife would able to carry above life style.
No, you are not going to be able to save 5.5 K złoty on that much.
14,000 gross a month is about 9000 PLN net.
Off the top, you will have to deduct for your relocation to Poland, that means plane tickets, all associated travel and shipping, visas and permits. Divide the total by 12 and deduct from your monthly income. This should be about 1000 PLN for two people, so that brings your balance down to about 8000 PLN.
Next is housing. A modest one bedroom (two room) apartment is going to cost you from 2000 to 2500 a month all inclusive: rent, administration fees and all utilities except internet/phone/TV. That will bring your balance down to 5500 to 6000 PLN.
Food and regular household supplies will set you back another 2000 PLN or so for a family of three. Less if you cook all meals at home using cheaper local ingredients, more if you eat, drink or snack away from home or use more expensive ingredients. Baby formula and food is quite expensive. So that will bring your balance down to 3500 to 4000 PLN, at best.
Then there are occasional purchases such as clothing, furniture and electronics, as well as recreation, hobbies and vacations. That's going to cost you about 1000 PLN a month at least, as you and your family will need good winter clothing and solid shoes. Baby clothes and diapers are rather expensive, too. so bring you balance down to 2500 to 3000 PLN, and probably a little less.
Then there are city transit cards for you and your wife, as well as cell phones and internet service. That will be about 500 PLN a month maximum. So your balance is now 2000 to 2500 PLN a month.
So no, there is no way that you will be able to save 5500 PLN a month.
The biggest problems with Poland are 1) wages are low; 2) cost of living relative to wages is rather high, especially if children are involved; and, most importantly 3) savings potential is very low.
To meet your savings goal you would have to earn at least 20,000 PLN a month gross, and probably a bit more.
My advice is to focus on finding work in richer countries where savings potential is much higher than in Poland.