Playing a Sim family on a lot and saving the game regularly, causes that after a while many problems and bugs start to be generated from aparently nothing that could be explained.
This is a little misleading. While I won't deny that occasionally a lot can become "buggy" or corrupted, simply playing that lot frequently and saving the game regularly doesn't cause the lot to become corrupted. It's possible to play the same lots for months or even years (real time).
Presently I can place a shack side by side to a palace and this makes no difference at all in terms of game-play. In real terms, it would drop the value for the palace.
Well, I suppose you could use the familyfunds cheat to reduce the amount of money that the richer families have when a poor family moves in nearby, if you want to simulate something like that. But your Sims have no awareness that there *are* houses nearby, let alone whether the neighbors are rich or poor.
Karen