Check out sponsors MarsHydro,they would be spot one for your money...
I would personally go for couple panels in first go,and i would suggest for 2xMH 700w led to get extra coverage.
Little bit over you budget,but i think Sara will make you outstanding offer
Twilight Groups LED and Twilight LED make the Twilight Groups LED Spider16 COB LED grow light with an actual draw of 800 watts that would compliment your grow area that I estimate would produce similar yields to a 1000 watt High Pressure Sodium light bulb.
Details & Questions About the Spider COB LED Grow Light - Twilight LED
I shall be reviewing the Twilight Groups LED Spider16 COB LED grow light in an upcoming Grow Journal and Review.
Mars-Hydro LED Grow Lights and Sara @Mars Hydro make many different LED grow lights that may equal the yield of a 1000 watt High Pressure Sodium light bulb.