Nice idea, but wrong, you're making an assumption about lack of thought without considering the context of the reply, in that it was merely highlighting that investment examples had been chosen to try and show 'landlording' in a better light. I'm not sure why you leap to the idea that I'm suggesting some sort of solo Dragons Den approach. Personally I think microfinance is the way to go in this respect and if you don't know what that is you can look it up. It doesn't have to be invested in startups only, that was just one of the alternates.
I also didn't suggest that there would be no rental properties, rather that property ownership would be limited to one title deed per person...not company....person. The State would have no such limitation and would need to buy up the excess property anyway. Nothing to stop a person owning a property, renting it out and renting accomodation for themselves from the State, or a couple/partnership doing the same. Think of it as some more QE from the State that frees up the housing market and forces capital into growth style, rather than rent seeking, investment. We'd still have right to buy in place, it would just stop individuals hoarding a scarce resource that is an essential for living. If they want to try and hoard in non-essentials then that's entirely up to them.