For me

1. That I have to work to get things unlocked
2. That I have to work hard getting their promotions ( making them workaholics takes time )
3. Raising money defo.
4. Having so many rooms to fill full of furniture.

Well

I only have simple things right now but my house is totally renovated now.

Living room
Table
2 quality sofas
2 plants

Toy room
2 pirate ships
Paddling pool
Toys ( 220 coin lot )

Office remodel in red

Kitchen remodel ( unsure )

Checkers workshop floor

Bedroom
Bed
Reindeer

That's about it for now I'm going to be buying new things soon