$40k a year to invest, best strategy to make the most of it?

[Jason Tracy]

Just used an FHA loan to buy my first house, moved in and am renting a room out already. I have $40k from this year saved and can continue saving the same each year pretty easily. However, I don't want to keep working forever, so what's the best strategy to grow $40k a year?

A house a year with a conventional loan works with housing in my area, but if not rented then I would be eating into that $40k. What do you all think I should do or is that a good strategy, “would/could it work”