That's a rather misleading statement on your part Dolno. You have very low outgoings as you own your home and don't have a child to raise.
Hi Roibeard, I'm Irish, married to a Polish man. First came here in 2006 for a holiday, loved it, moved here later that year - hated it!! We went back to Ireland and came back to Poland in 2015, so this time round I've been living here four and a half years - I can tolerate it but I'll never really like it. However, many Irish people have settled here quite happily so maybe you'll be one of them.
Yes you can live well off 14,000zl net, if it's 14,000 gross (brutto in Polish), then about a third will go in deductions so 9,000 or so is ok, very good by local standards, but you'll need to have up to 20% of the purchase price if you want to get a mortgage and at least a year's employment under your belt. So if you're trying to save that deposit from your salary and pay rent as well, you'll have to watch the pennies.
One thing I'll warn you about is the air quality in Kraków which is literally toxic, especially during the winter months.
The other thing you need to be aware of is that Poland is very much a post-communist country with a right wing authoritarian government.
not speaking the language
You will absolutely need to learn basic Polish for simple everday interactions. It's not easy to just 'pick up'. I'd advise you go to lessons.
Good luck with everything, hope it works out :)