I'm not advocating a one large stand ground or piecemeal expansion at GP at all. The new Bullens, existing Mainstand and extended Park end would all be roughly the same height and could knit together relatively seamlessly. Even at BMD the north stand is similarly lower than the other 3 sides. However, at GP we could also eventually increase capacity at the Gwladys St too if success demanded it, whereas we'll never be able to add capacity on 3 sides of BMD, with the only real prospect being via adoption of safe-standing at a greater than 1:1 ratio.
Whether you consider Anfield a carbunkle or not is irrelevant.... the fact is, they achieved a bigger capacity than BMD for less than £100m construction costs. They will soon go over 60k capacity for just another £60m.... the ROI is just a few years with their new mainstand already nearly paying for itself... there are preliminary plans to go higher too.
As regards the number of houses required at GP: there are only 2 streets abutting the Bullens. Just 10-20 end terrace houses would clear enough space to bridge the Bullens, with a few more for negotiated right of light conflicts. Literally thousands of these type of houses have been cleared all over the city in the last few decades, so this hardly represents a mass clearance of any significance, with a far greater number of empty properties currently in the locality. As far as being problematic or time consuming, LFC were granted CPOs and completed this process on a far bigger scale in no time at all, when they changed their minds about redevelopment.... including several listed and recently refurbished properties. So, i don't believe that to be a major issue at all.