Buying a house in need of renovation - What is the best approach?

-> Does something need to be done here because of the structural engineering?

5. I still dream of underfloor heating, at least on the ground floor.

7. Facade: insulate or leave as is,

Instead of the conservatory, we would like some kind of canopy

You can only calculate 6-7 k€ for screed

You can also easily knock it out yourself with a few buddies.

1. On the ground floor, the kitchen, living room, and children's room are to be opened up, creating a large open living area. -> Can these costs for a structural engineer, beams, and everything else needed for the renovation be estimated? If not, what might make an estimate possible? 2. On the ground floor, the hallway and entrance area are to become a guest bathroom. -> Does something also need to be done here regarding the structural integrity? If yes, what and what costs should I expect? 3. On the upper floor, the utility room, bathroom, WC, and hallway are to become a large bathroom. -> -> Does something also need to be done here regarding the structural integrity? If yes, what and what costs should I expect? 4. Heating: What are the exact requirements here? It is clear to us that the oil heating must be replaced. Is there a deadline of 2 years from purchase? However, we would like to plan with a heat pump for heating and hot water. Can the existing solar collectors possibly be used here? What costs need to be considered? 5. I am still dreaming of underfloor heating, at least on the ground floor. That would mean removing the screed, laying underfloor heating, and then putting new screed back in. -> Realistic or too expensive? Alternatives are new radiators. We can live with new radiators on the upper and attic floors as well. 6. Roof: How do you assess the roof? The realtor had no information about the age of the roof. Keep it and insulate from the inside? Or renew with external and between-rafter insulation? Overall, from my point of view, the existing insulation was not very professional. There was also no barrier or anything; the tiles were directly visible. -> Can anyone assess whether the insulation boards contain asbestos? 7. Facade: Insulate or leave as is, also with regard to the existing balcony (see below)? Furthermore, the roof and dormers would need to be "extended," right? Is this simple and cost-effective? 8. Windows/Front door: These also need to be replaced: double or triple glazed? Depending on the facade insulation? Front door must be new. 9. Electricity: Completely new -> I would probably do this myself (was once an electrician) 10. Water pipes + sewage: Everything needs to be new: What does something like this cost? 11. Balcony and conservatory: We do not find either attractive. Both should be removed if possible. Would a thermal bridge then form where the balcony was, and we would have to insulate the facade anyway? Instead of the conservatory, we would like some kind of roof, in the form of an "aluminum carport." Could something like that be well attached to an insulated facade at all? Or is the insulation too "soft" for that? 12. Garden could be somewhat bigger, but it is okay as it is. Overall, that would still be fine for us. 13. Exterior work such as garden beautification and front yard (possibly with one or two parking spaces) I would like to postpone for now.