I am curious to know how to set the city income

Sometimes the income can be set down to 1...... But I don't know how to do so.

I believe it involves some php sorcery, but I could be wrong. Not something most people can do, but I know there are some who know the secret. It's sort of like rating maps with a 0 or a 0.5, etc.

It's not too hard, actually.
All you have to do is mess with the HTML a bit.

Right click on the income field when creating a game and choose "Inspect element" (or something like it). This opens the development console in your browser.

Alternatively Firefox for example opens the console with Ctrl + Shift + K, but then you'd have to search for the correct element first.

In the HTML overview you will see something like the following:

Code:

<select name="funds">
<option value="0" selected="">0
</option><option value="500">500
</option><option value="1000" selected="">1000
</option><option value="1500">1500
</option><option value="2000">2000
</option>
...
</select>

If you only see the select element but no content, you'll have to click the small triangle on the left.

The selected="" at 1000 means that this is the currently selected option. In the developer console you should be able to edit the value field (value="1000") by double clicking it. Set it to anything you want and you will have a game with that amount of income per property.
You will only see this option in the dropdown if you also change the other "1000" in the HTML, but for game creation only the value="?" will be used.

I assume that this same trick can be used for rating maps as well, but I haven't tried it.

*gasp* the secret is out!

Yeah, I use that all the time, it helps with negative funding.

Doing such on map ratings requires a different level of sorcery....