Just build a starter pair of speakers with a simple crossover and when
their limitations really present problems with your playing over them
then upgrade. The neatest homebrew speakers that didn't cost much to
build that i have heard were built from a diagonally cut length of flue
tile, an inexpensive non-resonant cabinet for a pair of minis. They're
from some book somewhere but I forget which one. If you used the listed
drivers and crossover you were looking at roughly $150 for the pair.