general rule is 3500 btu's for each 1k of light plus 20 btu x sq ft

so 3500 x 4 = 14,000 btu + 10 x 10 = 100 x 20 = 2000 btu + 14,000 =

total = 16,000 btu

and i think thats without aircooled lights, so maybe you could get away with a little less, but deff need more than a 9000 btu portable, and make sure you get a good quality one so it lives up to its tru btu's as advertised.

Do you have Co2? you could get away with higher temps, but still would need an a/c, dehumid, since it would be an enclosed environment, but maybe could get away with a smaller a/c