I have no problem with being expensive. Employment I have a problem with. No employment = No staying in Canada. I want to avoid going back to my home country.
I do not get how thousands of immigrants are accepted each year without any jobs being available to them. The way you describe it is that each year there are 300,000 unemployed people added to the unemployed list.
I think your time is better served by researching what Canadian employers are looking for in your field of expertise. Target a few companies that are very close to your field, analyse their job postings, assess your skills against their requirements and find out what gaps are there (if any) - work on fulfilling those gaps before you land in Canadian soil.
Yes employers prefer Canadian experience and yes it helps to have a Canadian professional network, but you don't have either - what's within your control is your own skills, competence and experience, focus on strengthening that and you'll be able to compete. Its Business, if you can prove you can do the job better than the other candidates competing for it , you'll get it.
That is a much better plan than seeking low skilled jobs that will make you miserable and live a low standard of life.
Regarding the funds, you'll hardly survive 6 months with $15,000 - i would recommend bringing enough savings that would last you for at least a year. You don't have to move permanently immediately after becoming a PR, you can land at first, get your PR card and move at a later date if that suits you.