Planted tanks do well with perfect lighting, CO2 etc, but I only have water and a sand substrate, and the plants love it. Saying that, I have a juwel fishtank which has twin light strips....guess this must help. The tank is also near a window, so they do get a nice bit of afternoon sun (as does the algae though)
I have just started to add tablets of fertiliser to the sand, which took literally three minutes. One trick I did which I highly recommend......when your tank is ready for planting, buy half a dozen different plants, and see how they fare....a couple will thrive (so get more of these), whereas some may die off due to your water hardness/softness, pH, light levels etc (avoid getting more of these). Simple test to do, which could save you a lot of money and heartache in the long run.
Basically, buy as much for the plant as you can afford etc....then try it out. Worst that can happen is you shrug and say 'Time for plastic plants'