Purchase opportunity single-family house from the 80s - risk?!

In which category should the purchase of a home for personal use be tax-deductible?

In which category should the purchase of a home for personal use be tax deductible?

Seriously, ?! Sorry, but if I knew that, I wouldn't be asking

A single-family house for personal use cannot be deducted. You can deduct x craftsmen costs per calendar year. Exactly how much, I do not know at the moment.

You can deduct the wages for craftsmen. As far as I know, however, only if you already live in it. Otherwise, as an owner-occupier, you’re pretty much out of luck.

You can deduct x craftsmen costs per calendar year. How much exactly, I don't know at the moment.

But this also applies to tenants and should by now be general tax knowledge.
EDIT:

If you have craftsmen work done in your self-used apartment, you are allowed to deduct 20 percent of the labor costs from your taxes. This can save you up to 1,200 euros in taxes per year. You may only deduct work that serves the maintenance or renovation – but not those that create something new.

I don’t know exactly "where" you are right now. In NRW, for example, there is a reimbursement on part of the property transfer tax for homeownership purchased this year. The date of the notary appointment is relevant here. But that is NRW-specific. I can’t say how subsidies for renovations are handled. (Not relevant for us). However, I would guess you’ll have fewer problems if you first have the notary appointment and act on your property...