I will say one thing here.. I recently purchased a Nicer wen bandsaw, and love it. And it is so easy to resaw wood down to different sizes I find myself making sticks instead of digging thru the box of sticks I have.
But when you need a scroll saw you need a scroll saw ! Check the swap meets you can buy them cheap very often..Just saw one for $20. So possibly buy a decent bandsaw, and keep a cheap scroll saw somewhere out of the way until you need it.
Now if you absolutely have so little room its maybe a good idea to get a really good scroll saw with variable speed.. I have found with practice I can cut almost anything I want hobby wise on a scroll saw...
I am also very interested in Allan Flowers homemade saw above.. and have always wondered how ell it would work...