No, you don't get your money back mate.
Its a lengthy process that involves spending lots of money.
The best thing you can do is, get in touch with the DUC Down under training centre in London, they will help you understand the process & you can see from the outset whether you stand a chance, before spending money.
The problem in my eyes with your case is, post apprenticeship experience! I'm a time served industrial electrician with 12 years post apprenticeship experience, with instrumentation experience on water production sites, I'm absolutely sure that this played a factor in my state nomination for NSW, as like Ausvisitor above, I only had 65 points & submitted an EOI at the start of Sep 19, received an invite at the end of Sep 19, thats fairly quick when other electricians who submitted similar applications with 70, 75 & 80 points for the same type of visa, did not get invited.
Its all a risk to be honest, there are no guarantees.