Inexpensive/Budget/Economy Kilts are widely available, but they are not created equal. I own several kilts that are PV (Acrylic) with a bit of real wool (15% or so) that I am quite happy with and which I ordered directly from the usual lot of makers in Pakistan via eBay for less than US$50.00 each (including delivery, mind you). They are a bit prone to pilling, but also have a "textured" and genuinely "woolly", flannel-like "hand" and drape which, in my opinion, compares rather favorably to Pure Wool. I am also very happy with several economy kilts I have purchased from (among others) Highland Kilt Company and Tartanista, which are made of a firmly and tightly woven synthetic material that resembles a stout, sturdy, military type cotton twill with a "hard" finish that is--like any good twill cloth--completely resistant to pilling and lends itself extremely well to all-seasons (including warm weather) wear.

eBay (and other online locations, like Kilt Rental USA, et al.) can also be monitored for top-quality, Pure Wool, ex-rental/ex-hire kilts, kilt jackets, etc., for a fraction of what you would pay for them new or bespoke. Simply be diligent and Know Your Size.