Hi Guys,
just saw this thread by coincidence.
I have made a few custom boards by myself.
They work just fine without crashing.
I wanted to build bigger, better and more complex and often hit the boundaries of the game. So through trial and error I can now tell you some things about customising fortune street boards. It is 2am in Germany and my textfiles are on my laptop, but I can put the info online within the next days if someone is interested.
I made a board called the "Vegas invader" which my friends and me are playing constantly. I also succeeded in building a board that was not "meant to be" by the game. It is a spiral. You start from almost the outer end and walk to the middle. Since I am typing on my smartphone, it would be to much to describe. But it is not just a boring walk to the middle, it has a system of pipes that can allow you to skip big parts of the board and get a level up pretty quick. The stores get more and more expensive on your way to the middle. Buying price for the most expensive one is 7500, so it can be bought only later in the game. The pipes mentioned before can help you skip the horribly expensive center of the spiral - or put you right there. When you reach the middle, you find a door that brings you the outermost part of the spiral and you can walk over some fortune and game tiles. Since this board can take on a pretty rough dynamic and drastic changes we call it (translated from German) "The spiral of violence". I can post a Screenshot and would like to hear what you think about it.
For starters in customising this game: watch the YouTube videos of "abdallah" about customising fortune street. It is a good start.
And don't go to big, the game has limitations. They seem to vary on how many possible paths you have but they are still pretty close together. If I remember correctly you should not exceed around 75 tiles. And don't make district's with less than 3 shops or more than... uh... 6 I think. I will look it up. Most reasons for freezing can be avoided if you follow a few simple rules and do a little thinking (I once had a board where the fortune card set has a "teleport to circus or to sleep" card. It hit sleep... but I had no tile for that and it froze)
One more tip: if you finally have the impression that your board is debugged, start a computer match with high target amount and let the bots to the rest. If you wake up the next morning and you are seeing the ending screen, everything is fine. If not, you will see exactly what was happening when it froze. By doing so I pushed the boundaries to the maximum. Made a big cloud-like board with a 9 field "sun". You can only get to the sun by fortune card or balloon and you can get back by hitting a canon. The sun itself has fortune fields, circuses... ^^
Hope I could be of some help.