Home financing feasible or pipe dream?

The parents' house should not be the topic here. Your girlfriend is obliged to think about alternatives and ways that must influence your future. You, of course, too, and then also both of you together. Standing still or moving forward. If that is too tedious for her/you, then I would question the future partnership. Because: one actually likes to give in if the partnership benefits from it

Oh dear, did you lock them up??

It's not that bad!

But even she needs to get out sometimes, and a single walk at the Tegeler Fließ is not enough. The money for a week of wellness at the North Sea or four nights in Rome should always be available. For us, this is a very important point regarding quality of life. Some find it in their property, we are quite active, together, as a family and alone. That costs... Since the OP was also traveling a lot, he should consider whether he really wants/can easily remove that from his life or if he’d rather scale back a bit.

Otherwise, I also strongly recommend moving in together, child 1 (and maybe even 2), and then tackling the property.