Game Won't Save After Adding BuyDebug Items

How are you saving? I haven't had problems with buydebug items per se, but in the past have had save issues when building. I think it mostly became a problem (and was similar to yours with either saving going on forever or game crashing) when my old computer reached the point of being inadequate for the expansions that were then out, but changing my save method (which I've stuck with ever since) pretty much took care of it. What I do is retreat to edit town view, save my lot to the bin, then return to live mode and use save as, changing the file name. I never try to save a lot in build mode. If something should go wrong with the save as, I will then have the lot in my bin and can replace it in the world. Also, I save often (unless it's the middle of the night and I forget and regret it when my UI decides not to load properly - that's the only remaining problem I have with saving while building :D ).

Edited to add: I just noticed you mentioned building a world, and so if you are working in CAW, maybe it would be better to post this over in the Sims 3 Game Tools or World Builders section of the forum where people who work with the tool are more likely to see it.