I have been doing numerous researches. I am familiar with the process of building houses, as I am also an investor. I built a house few years ago and recently remodeled a few apartments. Happy to assist you with your assignment plus share what I know. I have current up to date experience - which is important, as prices in PL are going up almost on a monthly basis, not only for materials, but also for labor, especially in big cities. I have insights from Warsaw, Gdansk, Katowice plus no problem to find more first hand info if needed. Please contact me so we can discuss the assignment. Hope to hear from you soon. Best regards