Hello , I don't think the plan from #33 is that bad. I am missing the furnishings for an exact assessment. Especially the kitchen / living room / bedroom and bathrooms should be furnished to scale. Since the utility room/HAR is so small, it’s best to include that as well. For 6 people, you will probably need an extra hot water tank. Heating, electrical connection, water connection, washing machine, dryer – I think that will be more than tight. The hallway is quite spacious – you will probably have to sacrifice some of that space. With your plot of land, I see relatively high development costs coming your way. You first have to build a road leading into the property and then to the house. Then all the utility lines. Paths, parking spaces – in my opinion, it’s all somewhat further than usual. You should keep that in mind.