/ The big step: moving to Warsaw and taking everything with me to Poland
I'll do the questions i know for you (En veel plezier in Warsaw! Nederlander in Tricity hier)
* Given the fact my fiancée and I, will wait for a few more years before getting married, children are for now out of the question. So the central question is renting/buying an apartment/house in Warsaw. I have heard that the rent/buy ratio is high (meaning that the amount of rent you pay of an annual basis covers more than 5% of the buying price). So would it be more interesting to buy an apartment now and sell it in a few years - when we are going for children - or not?
I would strongly advice to buy instead of rent. I did the same and monthly costs are the same, if not lower than renting plus ofcourse, in the end you've pad for something, instead of TO someone.
- What are the laws concerned to short term reselling? Meaning: if I buy a house/flat now and I resell it within two to three years, do I have to pay additional taxes? (I am Belgian, we have taxes on anything)
I'm not aware of "additional" taxes but you do pay tax on "profit" if you resell in a certain amount of time. I think it was 3 or 5 years but im not sure.
- Is it normal that Polish flats get rented fully furnished? I've gone through olx.pl already and a lot of flats are displayed fully furnished. Just wondering.
Yes. That was a surprise for me too. Its different than in Benelux. Even the house i bought was partially furnished.
* I'll have to get my car from Belgium to Poland. It's a Mercedes Sprinter (registered as company car). Should I import it through legal ways or don't I have to worry about this because 'European Union'?
-its best to register it in Poland if you plan on staying here. No road taxes/car taxes as we know them in many other countries "you pay the tax in the fuel" which i also cheaper than BE or NL. Because its a van registering it will be very cheap, you dont have to pay the import tax on business vehicles. You'll have to translate the carpapers, and pay a small fee for importing it. There are companies that will help you with it for a small fee, which i'd highly recommend. It'll cost you less than 100euro and saves you heaps of hassle. You should be all done for under 1000zl with a Van.
* Are there any benefits tied to Polish citizenship? Belgium doesn't allow the denial of Belgian citizenship once received, so I would be Belgo-Polish if I got Polish citizenship.
i dont see any immediate benefits tied to Polish citizenship for a Belgian. Unless you'd like to buy property on the german-polish border. Plus you'd have to stay in Poland for a long while before you can get citizenship anyways.
* I have heard Poles are quite hard working even when it comes to weekend studies. So I wonder if there are any language courses available, especially in Polish and German. The work language won't be Polish as it will be English and, depending on the day of the week or the customer, Dutch and French. So, getting around with some basic Polish would be nice. I've seen that Polonicum does these kind of things for Polish, but I haven't quite seen something for German yet. So if you know something about that, it would be great.
All language courses are, in general, done in English to Polish. This to be able to answer the demand of the diverse group of foreigners. But i'm sure that in Warsaw, you'll be able to find a private tutor that can do it in German. Find yourself the Expats in Warsaw Facebook group (or sth similar). That has helped me to a lot of info in Tricity.
Hope i was of any help and good luck!