Hi, guys today I found a way to get 26588841% ROI per year!
First, you need a city like this.
https://prnt.sc/v3r1cr
This will cost you ~2.052 HIVE as 1 Park in the market is 1.08 HIVE and you can get 5% market fee from it.
With a city like this, it would have a ~21.53% to get a new citizen per day ( maximum 1 citizen per day so it's not 24% )
Next, one immigrants card in the bid market is 95 SIM and 1 homeless card is 44 SIM. ( assuming you use 0.01% as a market fee )
So you would get a ~0.07144 HIVE income per day ( 1 SIM ~0.004775 HIVE )
It's 3.481% per day!
We now calculate the yearly ROI.
1.0348196863^365=265988.419
We now have a 26588841% ROI!