Harvest Moon: A Wonderful Life Special Edition

Purchase every available extension from the ledger to unlock this trophy. Here's what you have to buy:

• Milking Room (60,000g)
• Food Processing Room (30,000g)
• Fertilizer Maker (15,000g)
• Chicken Yard (10,000g)
• Seed Maker (6500g or as a present from Daryl)
• Large Field (20,000g)

Not all of these will be available to you from the start. You can't buy the Seed Maker during Ch. 1, but you can receive it as a present if you befriend Daryl - which I recommend doing to save yourself some money.
For both the Large Field and the Chicken Yard you have to talk to Takakura first, once after you've unlocked the hybridize option and once after you own 4 or more chickens, respectively.

I recommend buying the Milking Room and the Fertilizer Maker last, because they're either very expensive or effectively useless. The Milking Room may lessen the manual work you have to do, but it won't help you make more profit, unlike the Food Processing Room, which I highly recommend you buy right after the pond.

You can make the money however way you choose, but here's a few tips I used during my playthrough of the game:

1. Befriend Darly (he likes fish) and visit his home during Ch. 1 to get a free Seed Maker, and plant a couple Banana trees as soon as you can (buy seeds at Vesta's Farm). Even though the price of Banana Seeds has been severly reduced in the Special Edition, they're still worth 140g per seed, pre-haggling. One tree produces 16 fruit every summer, so 32 seeds per tree if you put them in the Seed Maker. You will also save the money you'd have to spend on the Seed Maker later on.
2. Befriend Mukumuku as soon as you can during Ch. 1, Winter. He'll give you a record which you'll need for Record Keeping. But more importantly, he'll keep giving you 1 record every day if you talk to him after that. They sell for 405g before haggling at Van's Shop. For more information on how to befriend Mukumuku, see Record Keeping.
3. Unless you're using Star Cows, get the Food Processing Room ASAP. Cheese is worth much more than milk, even if you get S-Rank milk from your normal cows. The same is true for your goat.
4. Turn your excess cheap fish into Sashimi (See Main Course).
5. Plant Dhibe (Hybridize Strawberry+Turnip) once you have the chance. With them, you can cook Dhibe Cakes (Milk+Egg+Dhibe), provided you have unlocked the Dessert option (~40 dishes cooked, failures not included) - which you should have if you've made enough Sashimi. 1 Dhibe Cake sells for 2010g after haggling at Van's Shop. 1650 without haggling - but why would you do that?
6. If you plan on selling Dhibe Cake, make sure you use the cheapest milk you have - it can be Mother's Milk, Goat Milk or B-Rank milk depending on what you have available. Turn the rest of your milk into cheese or butter.
7. If you have Goat Milk that you don't plan on using for Dhibe Cake, turn it into cheese. It's worth slightly more than Goat Butter.

I had enough money to buy everything I need half-way through Ch. 3, and I could have been way more efficient in making money had I planted more Dhibe earlier, or simply not messed around so much.