Minimal Studio Space: need advise

Thank you everyone for your insights!

BAK, im currently with no camera to test it, and i dont really know the sizes of the softbox's
but i do need to have a general working plan,

If i understand you correctly your suggesting something that looks like this:

The white wall can be used as a reflector i suppose,
I want to share with you another 2 ideas:
1.Using Lastolite HiLite Bacgkround as the main light on the left side of the wall - i think it may save space as its basically combining a strobe+softbox and it will be 90° to the doll, providing a hard contrast look for the cloths + can use the other wall as reflector

Idea 2:
Buying(or building) a giant light cube like this one
http://www.walimex.com/nc/en/studio/produkt/13543

Which of the 3 options you believe would yield the highest quality photographs?
I even started to fantasize that with such space saving setups - perhaps i could shot the cloths on a model as well?

Again, thank you everyone! this really helps!

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Rostislav
www.500px.com/frosti7