Housing prices are a function of supply and demand. Frum people like living with other frum people with proximity to shuls schools and access to kosher food (etc..).
Moving a whole kehila would provide an initial benefit to the pioneers, but with the arrival of more families, we would just recreate the supply/demand issue and drive up the prices.
Also please keep family money out of the fruminomics. When Yankle brings a large downpayment from Tatty (increasing demand), he is artificially floating the high prices. Meaning; if no one could afford a 500k house then the prices would normalize around the real purchasing power of the family (250k?)
To get a good deal:
1. Move OOT
2. Be a pioneer and move a little farther out from the core area