Hmm. New job opportunities come V3. I’ve seen several regarding fishing, agriculture and all that but I have a few more legal jobs to add regarding V3.
So my first one would be agriculture. Legal and illegal. I know that fed has seen how the san valentia drugs work and how you grow them, sell them for cash, etc. This could be implemented for firestone but instead of drugs they would be wheat, corn, potatoes, etc. You could probably head to a hardware store in v3 to buy soil, then go to a farmers market that will sell you wheat or corn or whatever and then set the soil down and place the seeds on it. After 5 minutes it will sprout and you can collect it and sell it for maybe x2.5 the money you bought the seeds for or something like that. Then there can be illegal crops that are in for more value such as Barberry plants, Wild sugarcane, and more. The illegal seeds could be purchased from drumann and can lead to the plants getting confiscated and the grower being arrested if caught. This is my first idea that would support both legal and illegal people a bit more to provide more ways to make munny instead of robbing banks or stores.
Second Idea: So my second idea is a package delivery company. Yes, I know that firestone already has those as private businesses however there’s no way of making money unless your employer pays you. How this can work is that you have to have 0 arrests within 21 days, then you need to head to the delivery depot where it will have minivans and delivery trucks. With the minivans you can head to a person that will give you an objective to deliver packages to certain places for some money. Once you deliver the package to the place it will give you X amount of cash. You would probably be able to carry 6 at once in the minivan and 12 with the delivery truck. The truck could look like this: 
Once the package is delivered to the place, it would stay there for maybe 5 minutes and if someone spotted it, they’d have the opportunity of picking it up and stealing it, or porch pirating. Here they can deliver it to the black market person and sell it from anywhere from 50-5000 FSD maybe depending on the value of the package. A fair way of making money for both legal and illegal citizens.
My last idea is a money truck business. Now for this maybe it could be a privately owned company however maybe there could be money trucks that deliver cash from certain places to banks. It would be CFL required and the driver and other guard would probably make around 200 when they deliver cash from businesses to other places. This also sparks a chance for criminals to get involved since they can hold up money trucks and steal from them. They’d probably also be able to buy a c4 from drumann, place it on the back of the truck and blow it up. Then possibly collect 5000-50000 FSD from the job.
These were honestly just some cool ideas I thought of. Please let me know what you think 
thanks