Since you are already familiar with house hacking, I would consider converting your current home into a rent-by-room or whatever it takes to keep it as a long-term rental, then look for another home you can hack.

For sure, it is a long process, and it you are converting a basement or something, mot likely to fail.I'm starting to go through the process now.

I do not believe converting to condos would decontrol the building.I own a 4-unit multifamily in Union City and am considering condo converting it at some point in the future, though I do not think rent decontrol would be among the potential benefits of the conversion.

It's just chaos.Suggestions above include:To not rebuild and convert the land over to parkland. 

My original SFR was 1100sf and I added 2 units: an 800sf SB9 unit and a 750sf ADU (converted garage plus addition).

All the rest can be subbed out unless you are doing a full remodel by adding square footage to the house/converting a space (bath/bed etc).

You could also offer to cover part of their tax liability through negotiation or encourage them to convert the property into their primary residence to use the IRS exclusion for up to $250K/$500K in gains.

What is the realty of converting a new Warehouse build into apartment spaces?

It's also unlikely that you can convert a single-family home into a community center (not sure if you mean an actual community center or co-living space).

This is one of my old homes, nothing of a house, the garage was converted to a MB, it sold in like 3 days cash, INSANE price.