Er... Yeah. One minor note is that unfortunately we've found that even loads of modules don't make up for having all the space in a single one. Our syrian Scamp used to have a ton of rotastak and other bits, but even when we gave her additional big modules (a three tier bin, a hamster heaven, later a ZZ2...) it wasn't as good as a single big cage with slightly less total floorspace.
Based on that, I'd have to suggest scrapping the modular stuff for a single bigger cage - your ham will be much less likely to bar chew then
Sorry for saying it when I know you won't want to hear it, but Scamp's modular stuff cost over £200 and is all now unused, so I figured mentioning it now might save you a bit of cash.
Also, its easier to tame hams in non-modular setups