Here are the list you need in order to get the 2nd house extension and therefor be eligible to get married....
Chicken coop 5000g 420 wood
House 1 4700g 370 wood
Barn 6800g 500 wood
House 2 (can get married after this) 10,000g 750 wood
Hothouse, not required but nice for the boredom of winter, 30,000g and 580 wood. Of course they can be blown down in a hurricane or blizzard and you get to repair them then. Good times.
If you play well, you can have them all before fall year 1 is up, allowing you to start making that 30K back by growing pineapples. Say hello to profit.