If you load only the morphs you're going to use, then V3 isn't that bad. The easiest thing to do is load a V3 with everything in it, create the character, then use the INJection builder to create a file with just the morphs you used. Depending on the character, you may find it smaller than V2 or M2. I have an Aiko character packed with extra morphs that comes out to 50MB. I know I can get some good V3 characters with a lot less overhead than that!