Bought a house cheaply. What now?

The information that a gastronomy vacancy is included and that there was no competing bidder was already precise enough to very sensibly give the advice "when in doubt, don't keep dreaming on." Volunteering does not mean being a greenhorn amateur. Where a typical fiasco entry scenario is described, it is better to warn someone one time too many.

The new owner doesn't even know what he wants yet. There is no need to warn. And advice about relationships, future marriage, and discouraging it without even having any information about the persons involved is simply presumptuous. No, volunteering does not necessarily mean greenhorn. However, giving advice based on incomplete information is often a "symptom" of wannabe professionals. Because professionals gather all accessible information before evaluating a situation. I stick to my point: presumptuous and insulting.

The new owner doesn't even know what he wants yet. There's nothing to warn about. [..] Because professionals gather all accessible information before evaluating a matter.

Two sentences that you are welcome to apply to the matter discussed here. Do you get the impression that the approach for an investment (that was the only issue, see first post) was appropriate? Was it actually bought "cheap"? Were the value limits still valid? And how does one come up with the idea to believe that "the others" will definitely offer more, only to be the first to join the race? With a bid that was also capable of winning? This is not eBay highest bid, the creditor liked the price and accepted it.

The new owner doesn't even know what he wants yet. There is no need to warn anyone. And giving advice about the relationship, future marriage, and discouraging it without having any information about the people involved is simply presumptuous. No, volunteering does not necessarily mean a greenhorn. However, giving advice based on incomplete information is often a "symptom" of wannabe professionals. Because professionals gather all available information before evaluating a situation. I stick to my statement: presumptuous and insulting.

The only presumptuous one here is you! Anyone with a bit of sense can see that the boyfriend of the OP has blindly and naively maneuvered himself into a situation he cannot assess! All those here who urge caution and prudence to avoid being drawn into a financial disaster are acting sensibly and reasonably! Everything else is almost deliberately misguided advice!

The new owner doesn’t even know what he wants yet

Precisely for that reason, the OP is rightly being warned, because generally project planning is sensibly done BEFORE such a purchase.

There’s no need to warn anyone

That is surely something every forum participant can decide for themselves, and the OP will figure out on her own what she wants; she may and will decide that alone.

And giving advice about relationships, future marriage, and advising against it without having any information about the people involved is simply presumptuous.

Of course, no one intended to delve into slippery relationship details; however, for those “warners,” clear signs of thoughtless actions in connection with a costly project were recognizable. The OP deliberately named her thread conspicuously: “House bought cheaply. What now?” All forum participants were asked, and therefore everyone who can contribute a helpful post in their opinion responds.

“Symptom” of wannabe pros... I stand by it: presumptuous and insulting.

To me, it seems more presumptuous when someone attributes ill intent to a personally unknown forum participant and questions their competence or knowledge in such a blunt manner without knowing him/her personally. Again, only the OP alone can decide whether she feels insulted; it is rather intrusive to impose that feeling on her just because one cannot endure a different assessment and thus accuses others of unprofessional behavior. It’s a pity that you suspect malicious motives here and show angry self-righteousness instead of simply accepting that no one here harbors any negative intent, but for the repeatedly mentioned reasons gives a sincere piece of advice to a young woman to warn her against potentially careless steps.

At least you know where to turn if you ever need marriage counseling. In the HAUSBAU forum...

Well, with that idea, you could start your own thread, couldn't you?
"Marriage counseling" certainly doesn't harm anyone, especially or precisely when it comes to building/buying a house. If some people had gone there a bit earlier, not so many houses would be sold again today and livelihoods auctioned off (as in the thread).
So I look forward positively to your new thread on this absolutely important topic-.
Some even happened to meet their partner at a first consultation there, who had been coming and going for a longer time and for good reasons........or the sad fact was simply communicated via the usual registered mail without such counseling-.

I am always amazed at how the house-building users manage to entertain themselves autonomously for what feels like 2000 pages after just 3-4 posts from an OP.