How fast do you make money in the game?

I've heard that many things are able to be edited, but I'm wondering, would I for say, be able to buy a plot of land, and be able to hire workers to build a blueprint I get an architect to make, of a building? Because, that would be extremely awesome, I could have an EPIC custom house, or even my own building! But, I feel that, sorry for the inappropriateness, there would be oddly-shaped, disgusting buildings around... So, maybe it has to be approved first? Also, how cool would the game be, if you could become a mechanic, and make little inventions in a garage or something, and sell the blueprints to people for a wad of cash, and earn 50% of each sale. That would be a game-changer, how cool would it be if someone managed to create a hover-car, and it goes viral?! There could even be stores that can buy the blueprints for items, and sell them! If the game worked like that, I would buy the game twice! Just imagine the possibilities! Custom choppers, boats, etc. Last question concerning Boats, would you be able to find and claim islands in the game, or is that for the later stages? Thanks for reading, and I hoe you have a great time!