Problem is that earlwood is a long way from north ryde .
I think you will struggle to get a house in a position that is a commute to both .
If you could compromise with a town house something like this
http://www.realestate.com.au/property-townhouse-nsw-marsfield-114711791 gets you very close to north ryde and the railway for commuting.
I've seen things like this on a regular basis and it's under budget .
..... Didn't check the date ....
Cliff