What would work better in that area, is a shop backed tour guide come detector hire/ mobile setup. Your within driving distance from home, and your shop is in the back of your truck/4x4/trailer.
Day trips or weekends to each of those areas training/hiring selling your goods and services.
I did this for a period in the NSW golden triangle, so i know it works, and just the money from training was well worth it when it all comes together. I used to train those who booked in through the shop, the shop would ring me and give me the details of those who booked and the dates and place. I was payed by the shop as the customer would prepay through the shop on booking. (shop takes its cut)
I hired out my 4500, and walked beside it all day training those that hired it. You get the hire fee of the detector per day + the training fee per day. If the detector was hired from the shop...you get the training fee.
You become their shadow from 9-5pm. However if you have several clients, you float between them which gives them time to put into practice a little of what they have learned. information overload should be avoided given many of these people have never held a detector before. Having a partner who is also a detectorist is an advantage in times of multiple clients.
If your backed by a reputable shop front, you have all the sundries that you'd need out in the field to sell.
Make sure your up to date with the latest detectors tho, coin and relic machines, and not just gold detectors as some folk will bring their own to be trained with. Be ready and have a good answer for those who cannot find gold with a cross-over detector like the 705 while others with dedicated gold detectors find gold on day one.
A reputable shop will reward your sales, be it money or gear.??
If you have a wad of money behind you tho, than owning the detectors and gear outright would be a better way to go...you are then, your own boss.
Know your goldfields and know them well, as 100% hit rate = return business. Keep in touch with the locals round these fields...having sandwiches and drinks bought out to you from the local Pub because of the folk you bring to the town who stay/book accommodation, is just icing on the cake.
Just another avenue for you to think about, but which ever way you go, do your homework. Its your dream.
Good luck.
PS, im in WA prospecting with folks i met and trained 4 yrs ago back in Stuart Town...this is our 3 trip together over here, and regular get together's happen when we are back home in NSW with others we trained and know. Gold can be found in the ground, but also in the friendships you make along the way.