Another option, should you wish for something to be done rather early and then resort to a normal playthrough with the Community Center:
Start a new file, name yourself [163][166], take your time getting to the Saloon, and talk to Gus behind the counter 28 times (after the initial greeting, where he will say your name every time). 14-28 times will be just enough, as each time the name is said, it will give you a Legend fish and a Treasure Chest, both selling for 5,000g each. Sell all of these in order to obtain anywhere from the 140,000g to whatever amount you settled on. This should finish Day 1 as you need to throw that in the shipping bin to get paid.
Day 2: Go to JojaMart and buy the membership (-5,000g).
Day 3-7: Buy one of the development plans each and every day. There are only five, so by the time you are done with the 7th day , you'll have bought the last improvement (-140,000g).
Day 8: Head over to Pelican Town and you'll be given a cutscene with JojaMart congratulating you for a job well done. Yay capitalism! Trophy unlocked, Soda Machine given, and the corporation wins! Now you can go back to the menu, load your regular file up, and resume as normal.