Mustard House

I spent the weekend trying to design a backyard shop/office for myself and Bart.  I came away feeling very uninspired and defeated.  I guess I just wasn't feeling it.  But let's face it, Bart won't be happy until every last corner of that yard is used for shop space. 

So, I switched gears.  I still had a creative bug to kill and graphic design wasn't doing it.  Hence, the Mustard House.  I'm really trying to wrap my head around the tiny-house movement and have realized: it's a process.  This is the first step.   While I'm still tweaking the plans, it's shaped to have an open living/dining/kitchen area with two bedrooms in the back.  So far it's coming in around 1,200 square feet.  

I'd like to whittle this down to 900 square feet...I guess you lose a bedroom? What do you think? Could you live in 900 square feet?  What would be on your must-have list?