Yeah that is his problem... ast stated before a rebuild is alot more than $80-$100.
Look mate you've spent anywhere between $9,000 to $14,000+ on your car and beleive me its not going to be the last you spend on her....
If you wanna keep everything on the cheap thats fine but don't skimp on the important stuff.
Next you'll be asking if you can use cooking oil for the 100km service because regular oil is too expensive.
Anyways