One of the most popular and affordable holsters is the DIY oven-mitt down the front of your pants. Just make small cuts to thread a belt through and wear it under your pants. Just make sure you don't touch the trigger when drawing it because you could do a sex change on yourself. If you are already a girl then it's ok.
My oven mitt was a little rough on my, uh,.........well my sensitive skin in the front there. So I had a custom silk mitt made. I love it soooooooo much. I don't worry about the sex change thing anymore 'cause I'm contemplating on having that done now anyway, and it would save me even more money!
Hands down, the best inside the waistband holster is the Crossbreed Super Tuck. I use one with my Kimber .45 cal., Compact CDP II. On many occasions I have worn mine over 15 hours and it is always comfortable and secure.