I do not know if there is a project that has effectively integrated real estate, financial systems and DeFi tokens.
Still researching but RealT.co seem to have excellent working model (profit orientated though). Listened to 3 podcasts by COO, BDO and Co-Owners (real estate people). Worth a listen on: Into the Ether, Crypto & Things and Payments Show.
The problems Blockchain and Defi solves as an investor are liquidity of a rigid asset, allow lower entry levels for small investors (RealT as low as 50USD), remove the chunking entry barriers of traditional real estate investments.
That is use on the investor side, the flip I am more interested in is can it also function at a certain ethos: can it drive access to housing, make affordable housing, socially equitable etc. In the same way blockchain tries remove barriers and reduce costs and puts forward democratization, can that ethos be brought to housing. It works in reality because the government did it in the 60s 70s, they just stopped the policy, allowing private developers drive the market that crashed in 2008. A decade on they are not moving to solve any situation so I believe Blockchain and DeFi at it core principles can.
Ireland's housing problem currently (and always has) is a supply shortage. The price correction in 2008, was correcting reckless lending and resulting overvaluations. The current lending restrictions top out the fluctuations (people cant over borrow) and lows recover over time (as has happened in the last 12 years). Tokenization will not impact those exposures or risks. Tokenization shares the brut of the risk as well as much more.
DeFi Apps seem to have excellent capabilities.