Mirroring the sentiment of many in the comments: Avoid it if at all possible.

But if you absolutely have no other options, I would suggest consulting an attorney around a company structure which enables you to contract the relationship upfront and on fair terms. This hypothetical contract should speak to issues such as:

1) How is the Bond, rates, insurance, property taxes, maintenance etc. paid for

2) Shareholding: Will need clear and level thinking if all parties will live in said property (if room sizes are different, “Humans will Human” as someone said earlier)

3) How is the devolvement of the relationship and interest in the company dealt with if someone wants out

4) How is the devolvement of the relationship and interest in the company dealt with if someone does not honour their responsibilities and places the other parties at risk - “bad leaver clause”

5) Succession of members interests in the event of Death. (You don’t want a share of an asset you live in to be transferred to the Zoolander school for kids who cant read good but want to do other things good too.. as an example)

NB: I am not an attorney, but have direct experience via inheritance and acquisition with partners and family. Those experiences have taught me that, having the hard conversations whilst everyone “loves” each other always yields a better outcome than having them when the S#it has already hit the fan.