I don't like 'having people in' either, but like others we have got the house ready to enter our 70s with no major disruption left, we hope. Well, apart from the new windows I am putting off getting done, and we should really replace the garage 😢.
We had the kitchen done a couple of years ago (time flies - it feels like yesterday!) and it took a lot longer than expected. It was very stressful, as it ran perilously close to Christmas, the contents of the kitchen were in the dining room, and we were having the bedrooms decorated at the same time.
As with Flippineck's men the first thing they did was use the downstairs loo, and once one couldn't wait so used the upstairs one at the same time as his mate was downstairs. I could have cried. I suppose their digestive systems were used to going an hour or so after their breakfast, which would be used travelling to work. It was very intrusive though.
We went out for breakfast every day to get out of the way, which was quite nice at first, but got wearing when it snowed and the novelty had worn off. It was expensive, too. The power was turned on and off without warning, so the heating went off and the house got cold, and when I could put the heating on they would go out to their van and leave the front door open to let the cold air in. I couldn't settle to anything, as I never knew when someone would come in and comment on what I was doing (that really unsettles me), and in any case the Internet/TV/lights/water could go off without warning. I really longed for them to just Go Away
. The decorators arrived towards the end, having been booked to come when they (should have) left. They were very understanding, and did the bedrooms first, and the kitchen after Christmas, which was kind, but meant that we couldn't even escape upstairs as that was colonised too.
We have most recently had a boot room fitted out with cupboards, and the decorators left last week after a gap of a few weeks. It was a lot less traumatic than the kitchen, but I was still relieved when we got the house to ourselves again. I think it's having people with access to all areas that is stressful.