Ah my bad. I think you could make it a bit more clear in your post but it's definitely on me for misunderstanding. If the information about the residence was given in the document itself then it becomes a lot more doable.

I still see quite few problems such as neighbourhood, etc. influencing the price, which means you'd need an absolutely huge dataset with very detailed features. And even then I think the accuracy will still not be optimal. Then there's still the issue with scraping competitors data from their website, which I doubt is legal.

It really depends on what this will be used for. Want to use this to recommend houses to potential buyers in a certain price range? Absolutely doable, but it seems completely overkill for an application like that. Want to use it to replace humans who's job it is to give price estimations? Probably not a good idea.