So far the DreamWEaver limit has not been set. So currently as many as you can win.
Mods possibly if I start to get bigger and more well known. Right now I can take care of everything.
A DreamWeaver ages real slowly about one year in about 500 human years. To be old and powerful they must be over 10 DW years old. But they are unable to reach that unless I have designed them to be like it. Sorry