A natural blind is free and a rush when deer get close but I don't theink you can beat the conveience of a portable ground blind. A lot of them set up in seconds and yu can place them where needed to hunt the wind which you cant do with a natural ground blind. I've seen some cheap one in the sportsmans guide. I think if it were buy one or build one you'd be ahead ofthe game to buy one

http://www.sportsmansguide.com/brows...a=&p=&bt=&pg=4

They may seem pricey but they are light and portable which may be tough to duplicate on a homemade blind