Wormholes is already a bit more involved than this. I have my next couple of projects already planned. I've been buying assets for my projects for after Wormhole Ventures for more than a year. :)

I have a few projects I need to try to knock out while I'm still alive. :P

You wanted to model different ideas... from the Anarcho-Capitalist ideology every thing works by voluntary contracts between individuals...

So my contract would be perhaps negotiating with the river guy that I would store 1 food for him on my property for in the event of a flooding in exchange for 1 food. I would also work out something such as being willing to carry some of his goods to trade if I have room such that I receive 0.25 of whatever we trade for...

Stuff like that... but what I actually would ask for depends upon a lot of factors.

It doesn't sound like you've really worked in any restrictions to trading which requires passage through other people's property. :)

Getting to the horses for example would cross through an incredible amount of territory belonging to other people.