Well so you can get an Idea of what it will cost to get a planted tank similar in size to yours running.
$280.00 on my tank and stand setup. (I feel like I did alright on that aspect, I know some spend hundreds...)
$145.00 on my Eheim 2217
$120.00 on Odyssea quad t5 with plant lights.
$100.00 +/- on sand. (bio-active Cichlid sand)
$40.00 on heater.
$60.00 on driftwood.
$35.00 on a powerhead-circulation pump.(real low setting)
Then you need to stock with fish and figure out which plants you will use. I have about $150-200 in fish and probably $30 in plants to date. But I have been adding a few plants every week.
Roughly $1000.00 in my current setup before food, fertilizers (wet-dry) and other miscellaneous items that we all know I am missing.
65 Gallon Tall 4' long Planted aquarium, Eheim 2217
Stock: 6 Roseline's, 6 Peppered Corys, 4 Oto's, 5 Giant Danios, 4 Rosey Barbs, 2 Ruby Rams-Male-Female, 1 F German Ram, 2 Dwarf Gourami, 2 Angle Fish, 3 shrimp.
Hey I just did my tank on a budget... few things
A low/med tech light varies in price $60 - $200. Oddysea Lights new (for a 108W set up) is $60 shipped. So depending on the value of your fish and the brands the guy has it may be a decent trade.
New bulbs for a 48" range $10-$25 each.
Substrate: I used turface hertiage red, a $20 bag did my entire tank and looks/works great for the plants so far.
Ferts: All I use is Seachum Flourish Root Tabs
My Light: I did a DYI CFL set up, cost me $40 total and was easy, plus completely customizable
Plants: I probably couldn't grow and sort of carpet, unless it was a simple moss, but my plants have all been doing well (except the amazon sword)
While this can be expensive, it does not need to be.