Allowing investors to build/buy housing units and rent them out is a clear one that enables investment. Depreciation wouldn't make it a bad (or non-) investment

Allowing investors to build/buy housing units and rent them out is a clear one that enables investment. Depreciation wouldn't make it a bad (or non-) investment, as long as returns are good over the unit lifetime. That's the default assumption for non urban housing where land is abundant.