" Do any of these people realise that for every dwelling an investor owns or buys it's one less dwelling a potential homeowner has a chance of owning or buying. "
Absolute BS . How many dwellings should we have available so the potential homeowner can pick and choose .
You also omit that there are many people who need to rent for various reasons . There is a large rental demand that needs to be serviced . Who else do you expect to supply the rental properties , the government ?
