Here is my low tech ten gal from a year or so ago (it looks much different now). This was my first real attempt at a natural looking aquarium and there was not a lot of overall maintenance that went into it on a daily basis. Nothing regarding this tank was particularly expensive, but it did take a little research (which in itself was a lot of fun
).
http://s4.photobucket.com/user/Kenobio/media/IMG_3024_zpsde0b8b06.jpg.html
If you want to go the nature aquarium route I'd suggest reeeally going natural. No fake driftwood and no fake plants. Ditch the bright gravel and go with something more natural like sand or EcoComplete (great for live plants and my recommendation for sure). The truth is, live plants can be pretty easy as long as you go with plants that are appropriate to your lighting. Once you go live you can potentially go oh-so-far into a crazy world of high lighting, CO2, ferts, ridiculously expensive plants, and so forth. It's incredibly addictive, but the beauty is that you can also have wonderfully beautiful tanks with really hardy and low maintenance plants too without worrying about all the other complicated stuff too much. In regards to the fake driftwood if you're really feeling the pull of a natural aquarium the artificiality of something plastic or not real wood in your tank will eventually bug the hell out of you, especially when you begin to discover the truly one-of-a-kind pieces of real driftwood that make our tanks unique. Malaysian, mopani, and manzanita (as in my 10g) can often be found cheaply (relatively) online or at certainly other places if you look hard enough (craft stores, thrift stores, garden/landscape stores, etc). Ebay is a great source for WYSIWYG items.
Finally... I know you put a lot of work into putting that background on but I'd definitely recommend replacing it with a solid color like black or maybe even like a frosted tint like Bill's TOTM from a few months back. Backgrounds with patterns just pull attention away from the actual aquascape you're creating and do not aid in creating negative space, which is very important in nature aquariums in regards to perspective.
Just a few friendly suggestions.