Yes, especially now with the changes made to gardening. I've been testing gardening before I get Seasons to see how it works. I just finished a game last night in which an unemployed Sim had accumulated over $200K going into the third week of his game. He's not married yet.
The Sim started out unemployed with no skills, living in a tent with four other portable objects. His money was set to zero. He spent the first two days collecting whatever he could from the area around his home lot - Hallow Slough. Most of the plants in the nearby community garden were ready to harvest on the third day. He also made a quick trip to the produce stand in San Myshuno to purchase a lemon and a plantain.
It took two weeks for his first two herb plants to be ready to harvest. In the meantime, he had been selling everything that he collected (fossils, frogs, time capsules, treasure maps, etc.,) and using the money he got to craft paintings using the easels that are everywhere in Windenburg, and at the Art Center in San Myshuno. By the time the plants started blooming, his paintings were consistently excellent quality and were selling for about $200 to $300 each. He was still unemployed.
A day or two after the two herb plants bloomed, his rose, daisy, and chrysanthemum plants were ready to harvest. The apple, lemon and plantain trees took longer.
He hit the jackpot when he was able to harvest a Dragon Fruit plant and a UFO plant at the Romance Festival. He planted them as soon as he got home. They took over a week to mature but when they did - wow! Even at normal quality, they sell for quite a bit of money. He seems to be able to harvest them like every other day. He hasn't maxed the Gardening skill yet. In fact, he hasn't maxed any skill yet. And he's still unemployed.
I was going to move him to a penthouse in San Myshuno, but I lost interest in his game when he got home from a vacation to Selvadorada and his personal inventory was empty. Everything that he had collected or purchased in Selvadorada (machetes, ointments, foams, etc.,) plus insect repellant were all just gone. A lot of that stuff wasn't cheap.
Obviously, I used a cheat to reduce his funds to zero when I started his game. I also have a mod that prevents random flirting. That's it.