Lalor Park
Sounds like it must be reasonably nice for that money in LP...you are probably going to need a 2-income family renting the place, most likely. If they have city jobs, transport is an issue there. The most attractive station in terms of frequency of trains is Blacktown but the catch is, there is virtually no parking to speak of there (unless they have built something amazing in the last few years). And it's pretty horrible (one of my cars was broken into and set fire to near the station there, in broad daylight at 3pm on a weekday). Probably the nearest station to Lalor Park with any chance of parking is Seven Hills, which has a really big but really creepy parking station and some on the street, neither are an attractive option if your car is anything better than my Hyundai (which has not been torched, as I moved to leafier climes!) And also, the trains stopping are less frequent at Sevo than Blacktown. Then there is the privately run bus line to the city that heads North..notoriously difficult to use - expensive, overcrowded and you usually unless you are lucky, have to drive to get to the stop in the first place. In short, it is a fraught place to be trying to live a half decent life. Having said all that, thousands of people do put up with it all. Can't help thinking though you would be better off, as said by others here, sticking to somewhere in walking distance of a station on the main line between City and Penrith, this is the line where trains are most frequent. Probably don't go beyond Doonside though.
Believe me, after standing most of the way home in an overcrowded peak hour train from the city, all an exhausted westie wants to do is fall off the bloody thing and walk home. They don't want to have the insult to injury of having to join a traffic queue as well.