Relocate or detonate?

This house is really very quaint. It was built by a German cabinet maker around 1939 which accounts for all the dark timber beams. It also has two stable doors. It certainly is not typical of any other house in Australia.

But should we try and save it? What do you think? Does anyone know how to do a lifecycle assessment?

Intuitively it seems that we should. But it has gaps all over the place. We've used heaps of heating in the past year and for the first time ever used cooling in summer. Our bedroom has the equivalent open air gap of 20 cm x 20 cm as the louvres won't close.
On the other hand, we did read a report that said it would take 300 years for an inefficient existing house to use the same energy required to build a new place, even a supposedly sustainable one (can't remember the source.

For someone who wants to live in this house for years, they could easily fill the gaps and put in some insulation.

By the way, did we mention before about the recent scandalous past of this house - it involves lovers trysts, extreme wealth and untimely death. It was also famous for its Christmas lights. Two electricians used to come each year to set them up. That is until the green party poopers arrived who had neither the interest nor money to continue this tradition. Nor are we interested in continuing the scandals although who knows what might be unearthed when the diggers come in.