Yes and no. I can make about 50k a day right now. But I'm spending as fast as I make it. Plus I'm in a transition now from Blue Houses to White houses. For every 3 blue houses, I can have 4 white houses on the same plot of land. And with land prices shooting up to 33k a plot, having more on less makes more sense.
I think the last building I bought, City Hall was in the close to 50k. So the prices are definitely going up.