Build a terraced end house with an additional unit (GÜ) on your own

Which floors are you putting in there? Can you do all of that yourself?

Are you doing the painting + flooring yourselves? Because four weeks is quite ambitious. We have now painted the entire house twice and laid the floor upstairs, so you don't need anything else for now.

We will have the painting work done by the main contractor - otherwise we will lay the Parador Modular One design flooring throughout the house - except, of course, in the wet areas. There will be tiles there.

It is laid like laminate and only requires a vapor barrier underneath - it already has impact sound insulation, etc. That is about 100 sqm for two people. I think it should be doable in a week.

If you have endurance, you might manage two days in a row, then your knees or the skin are completely done and you first have to take at least two days off. We have now laid almost 75m² over three weekends, each Friday 2-3 hours and Saturday 6-8 hours, that worked quite well.

The floor was full vinyl and could be easily scored and snapped with the knife, which is significantly easier and faster than cutting each board with the jigsaw or miter saw.

Costs?

22-25 € per sqm.

That is about 100 sqm for two people.

100 sqm in one piece is not the problem. Split into 4-5 rooms, however, it will drag on because the first row must be laid perfectly, otherwise it looks like a mess.
If you have laid flooring before, you have the technique, if not, you will have to rely a lot on strength. Lateral epicondylitis says hello, it plagued me for about 3/4 of a year. Cutting with a jigsaw and circular saw is not rocket science, but it makes a mess and costs time. Especially in small rooms, it is a torture, marking every 2-3 floorboards, standing up, going to the miter saw or jigsaw, down on the floor again.