@Svetlin_Balkanski I like the textures you created. And, you are correct, hand creating textures or, even altering existing textures can and do take time, sometimes a lot of time! I tend to stick with photos or pre-made textures usually with alterations since I like a more realistic look for my creations plus, I am not great at drawing.
If you are looking for photo-realistic textures for your house, you could see if http://www.textures.com/ or http://www.mayang.com/textures/ have anything you can use. Both offer free accounts for personal or commercial for textures you can use for your models. There are restrictions for use so be sure to read each of the licensing agreements.
@Stephen Thanks for the link to Texture Paint video. I really know nothing about texture painting so have put the video on my “morning over coffee” to do list!
P.S. Just watched the video for hand painting textures, was very informative. Not sure I have the skills for all the shading. The same Video Author also has one on photo realistic painting, which is also good. https://youtu.be/YNxmh5UVi08