Costing of getting back into the industry
The requirements for the CPL that you would be eligible for would be the 200 hour CPL. You already stated you have the 200 hours.
The requirement is that at least 100 hours of that be flown as PIC. Simply grab a couple of your local schools rate sheets. Mulitply your shortfall (if any) of the 100 hours PIC to get that figure. Next add on about 30 hours at their dual rate in the CPL trainer (120 knots and a CSU ) which should be more than required to get to CPL standard. Factor in that you will also require 10 hours of IF which you should be able to embed any shortfall into your training at no additional cost.
Add about $1500 for a CPL flight test, and another $15K to $16K for an instructor rating. That will give you a very accurate idea of how much you will spend.
Add $196 for an ASIC card, and a couple of dollars for a medical.
Retrieve all of your old exam results. If they are misplaced get on to CASA early for the exam result reprints. These will be your areas of deficiency and will be questioned during the ground component of the flight test. The references on the KDR (knowledge deficiency report) relate back to the day vfr syllabus from the CASA website and will form the basis of the oral exam of the CPL flight test.
If you have a bit of life experience and are prepared to move you shouldnt have too much difficulty securing instructional work, as long as you appereciate that your first few years income will be in the vicinity of $25K to $35K.
If married to someone with only a reasonable income consideration should be made to updating to a new model with a high capacity to earn. I would however suggest avoiding a potential wife with any sort of a legal background