Hi Stick man,
Good on you for following your dream through to this point, I went on the same path in the early 90s but through lack of finance, guts and scholarley aptitude I failed the exam (twice), so I turned away from CPLH,(which was my mistake) with just private un restricted and took up mustering with my Gyro.
But it lead me to getting a gig (still in the industry) working with big choppers in the Maldives, then flying Microlights in Africa for 2000 Hours, and am still flying microlights here.
I would sugest to look at getting the endorsements on types that are used in the tourist and mining/survey industry (206 Jetranger/ B47 /R44) as soon as you can, as the mustering industry leans toward employing young skilled cowboys(literaly) and teaching them flying, rather than starting with a good pilot then teaching them cattle.
Im guessing that at 50 you prob would not be so interested in sleeping in swag in hangar and washing choppers, waiting for the honnor of ferrying R22s (unpaid) for your first 100 hours then mustering in machines that are over hours and under powered till you have the required 500 hours and can thus be insured.
The mustering game is tough.
At our age, and with low hours we are more employable as "people pilots" cos we look more experianced and trustworthy,can communicate well,and will show up early and well presented each day.
You have prob heard and seen peoples negative reaction ( unfounded) when they jump into a Cessna for a scenic and later exclaim "the pilot looked 19", so there are some advantages to being a more mature pilot.
Anyway Im sure you know what it takes to succeed in other fields, so apply your positive attitude, dont be discoraged, employ the best training, and you will eventualy get there.
Wishing you the very best.
Regards John