Step 1: Step 1 - Humble Beginnings
What you want to do is to get enough money to buy the cheapest house in the Dweller camp. Put the rent to highest so you get the maximum amount of money every 5 minutes. The people will hate you for this but if you set a price that they like, it will take AGES to make money. You can put the prices down again once you have beaten the game and they will quickly like you again.
Once you have got enough money from income or quests etc, buy another house and put the prices up to highest. Keep doing this until you have 4 or 5 houses.
Step 2: Step 2 - Shops
Once you have enough money to buy the cheapest shop in the Dweller camp, sell all of your houses and buy it and put the prices up.
Shops are better than houses because they don't constantly need repairing and they bring in way more income than houses do.
Step 3: Step 3 - Expanding
Next you will want to start buying stalls in Brightwall Village and eventually the pub, black smith and pawnbroker etc. I advise that you buy all the shops in one town or area before moving on to the next else it starts to get confusing.
Step 4: Step 4 - Dominance
It is a good idea to progress through the story at the same time as making money because it means you will be discovering new places. Places that you can buy all the shops in!
Step 5: Step 5 - Beating the Game
Step 6: Tips
Thanks for reading this instructable, please leave any questions in the comments section.