well, my hobby time is limited. I could invest it in my personal projects, in sculpting or in this. I'm liking the effect i've achieved, but i don't have a real use for my own games... i did it just because.
If you have no interest in these for your own gaming, a full on KS project (even a small one) is probably not realistic as that would commit you to producing enough buildings to make a decent range and it would cease to be anything "hobby" and become another day job, taking up what time you do have for hobby.
Although I would back a KS if you did one I think you are probably better spending a little time to create a few new skins for this building and sell it in pdf as a stand alone product. I can see this with bricked up windows, timber plank and corrugated tin covered windows, graffiti and handbills/posters.
Then add other buildings in the same decaying/grimy style as and when you feel inspired to do so.
If you do go down the KS route (rather than indigo-go) you will need to launch the project with a "partner" in a country that KS does allow so you can use their registered address and bank. Given you will want the funds available in €€ that means someone in Ireland or The Netherlands (anywhere else and you will be hit by currency xfer fees) and depending on how much you get there are money laundering and tax issues to consider.