I found a house in the gallery that I wanted to place in one of the neighborhoods. Unfortunately, I cannot find a lot big enough to accommodate this house. :( I did find a house I could delete an...
I too wish we had more 64x64 lots. I have an asylum (from Sims3) I wish I could rebuild for Sims4 (minus the bell tower -due to the floor height restrictions :( ).
The 50x40 lot in Newcrest isn't large enough for it either, and (like you) I don't like to bulldoze large houses. I wish we had an "edit world" for Sims4, so we could add more lots.