My parents wanted to have an insecthotel. I decided not to buy one, but to make one!
On my walks I always find a lot of treasures. I knew a place were a lot of cow pasley (fluitenkruid) grew, and a big tractor drove over the plants. So I wouldn't have to cut off live pieces of the plants (I wouldn't do that anyway), and on that same walk I found some small pine cones. All I bought was a cheap wooden box, that's it.