Everyone runs their financials differently but in my mind, PBR makes even less sense. Especially since if you're not going to JV with someone else, you need to have property management, asset management and operations departments - these aren't small things to start up, especially if the whole industry is in a bit of a 'cool down mode'. You're also booking your income / proforma in a way which most condo shops don't do - your lending structure changes, as do your lenders. Income doesn't come in quick deposit lumps and you have to look much farther out to see 'success'. On the ground, you also need to design your M&E systems differently and likely re-demise your floors (PBR is often larger than condo).
Some places can do it, most can't. In general, I've not heard of anyone switching the tenure of their buildings over, just kicking them down the line a bit.