Private annex room to rent in family house

I'm currently getting the internal doors blocked off to the main house so the room and utility are separate to the rest of the house with back door access. There will be a shower added to the bathroom. Basically you'll have your own annex space. My belongings will be removed so you'll have a very large room for a king bed plus sofa and tv, utility area for fridge, storage and cooking, plus bathroom with shower. In the main house is me, 10yr old boy and sometimes adult daughter when home from uni. You won't have access to the main house, you'll have your own space. Fairly quiet house with the exception of family noise and the odd bbq or family get together. Can be furnished if needed but I won't be replacing items especially white goods. Currently main room is mostly empty, I've put a king size bed in there (see photos), you'll need own mattress. Buying a sofa this week. I will pay for a DBS check just because my youngest is on the property.