WELCOME TO THE FORUMHi,
I only have room for a portable table saw (I lack a garage or any other place for a permanent table saw). Is using a portable table saw simply a non-starter for building furniture? What would be the most obvious flaw that would be insurmountable given enough care in setting it up and in using it?
Not really a flaw, but having the capacity of longer rails/fence assembly. If you're cutting sheet goods having a surround table/outfeed table would be beneficial, and that could be portable. The saw may not be as powerful as some, but having the correct blade helps.