I don't think the failings as you refer are into the billions yet Ron, that's rail you are thinking of.  My point here is that parks and sidewalks are for public use, not illegal squatters.  I want to enjoy Kaka'ako park yet I can't because it's infested and unsafe.  Sweeps are only ineffective because there is no consequence and homeless basically spit in the face of the law.  Comparable to you parking illegally, moving your car when the tow wagon comes, only to re-park it after it leaves.
Exactly what is "minimalist cost effective housing" and where will this be built? As if the city or state is capable of providing housing given their dismal track record building anything within a budget.  They will need billions to provide housing and more importantly have to partner with developers willing to deal with government bureaucracy.   I'm for a housing solution, but there needs to be skin in the game for anyone that receives it, or it wont' work.  Free has no value to those in receipt.