We are looking at houses around 100-200 living space, and 2.000 and up for a plot
Can't imagine it'll be possible to get such a thing in a desirable area where tourists will actually want to rent the place.
There's plenty of houses on the market for those specifications, but as you can see, most of them need pretty major renovations even if the structure is sound.
otodom.pl/sprzedaz/dom/dolnoslaskie/?search%5Bfilter_float_price%3Afrom%5D=100000&search%5Bfilter_float_price%3Ato%5D=200000&search%5Bfilter_float_m%3Afrom%5D=100&search%5Bfilter_float_terrain_area%3Afrom%5D=2000&search%5Bdescription%5D=1