IF you are looking for a super-fast and easy ROI then check out the returns of the lowest cost city that can access citizen minting growth in the 
If you haven't heard dCITY is that amazing hive based blockchain city simulation game that pays a handsome 40% APR right now for SIM POWER(30 day avg SIM holdings).
Check it https://dcity.io/
You simply need to qualify your city to rank in the top 400 income leaderboard.
The income necessary for qualification has a really low barrier for entry and with a little understanding of the best card combinations you can easily make a valuable and profitable city that produces passive and semi passive income through citizen farming.
For the price of $1.11 or around 3 HIVE you can begin minting citizens which hold a value of $.08-$.18 or .18-.5 HIVE per day.
The "new" citizen minting mechanics were introduced some time last year and have had a profound effect upon the price of dCITY assets with the introduction of a citizen lifecycle.
As an example of the effect this had check out the price of the homeless.
Once upon a time back in 2021 the humble homeless citizen which was being massively & passively overprinted resulting in a price that was less than 1 SIM and today the last price for homeless was over 1147 SIM.
Of course, the homeless card has nearly been completely removed from the minting process with the introduction of students and the following jobs that citizens can become after college graduation.
You actually still have a small chance of obtaining the homeless cards after graduation, but you are more likely to receive positive income citizens who have tax refund status.
You can probably do it with less if you do a little more research but for the sake of this post, I am going to use a city modeled after 
His city is in the top 400 but he needs to pay off his student debt.
Paying off student loans comes at a cost of 180 SIM and can be accessed through the city dashboard on the bottom right side of the menu.
With only 3 building cards and 8 citizens you can achieve leaderboard status.
Let's take a look at these cards in question:
1x Park
2x Ice Cream Shop
1x Sick Citizen
1x Young Citizen
2x Economist
2x Eco Activist
2x Student
The total bid price for these 12 cards is 7.6k SIM and the ask price is 15.3k SIM which is where I came up with the $1.11 cost to access this citizen farming strategy but as you can see if you place bids, you could do this for less.
Students are actively being sold at the current bid price of 901 SIM with an ask of 1460 SIM.
If you sold every student for the bid price of 901 SIM or .18 HIVE you would be able to ROI in 16 days with active citizen claims.
If you played the market and used the ask price of 1450 you could potentially ROI in as little as 11 days with active citizen claims.
The only barrier for the sales of students is the time it takes the young citizen card to mature into students.
This process can take longer when the President changes the aging rate of citizens but right now is the best time to get started because the rate is currently maxed out.
Citizen claims take place in the dcity discord and reward Young Citizens every 24 hours for top 400 income status.
Join the discord and say hello!
