An IR is quickly done and money easily spent so I would do some research what type would give you the best change getting a job.
Maybe go see some companies, ask for jobs and say you'll have the required type in a month. It would be a waste of money doing it on 1 type and then have to invest in another typerating to get a job.
I agree, don't rule out the AW109. It might be a bit more expensive but if the chance to get a job is better than it's worth to invest in it.
500hrs. not impossible to get some ok-ish starting job. Payment might be a bit low the first 1-2 years but then you'll have more hours and can start climbing up....
Research, visit, make a plan and get lucky....