Trailer Grow: Future Plan

I plan on getting a 120 secret Jardin for 600 watt HPS for flower. And a smaller tent t5 for veg? The only thing is I am worried about metal halide for heat and more electricity use in veg. i have not grown yet. hope to spread this thread as long as possible, try to stay on topic but also throw in anything helpful for a newb. Im tired of buying weed. and 600 should set me up with enough to smoke and sell. Would it make sense to get a separate tent for t5? i know a lot smaller, dont want another vortex fan, will just throw a small fan inside veg, like a regular circular fan near vent hole. im leaning on t5 way more than cfl and led, and most definitely more than metal halide. definitely going to get 600 watt hps for flower, and t5 will take longer to veg im sure than MH leaving me a lot of time for flowers to catch up. looking my veg t5's vertically possibly even 600 to go vert in the middle of flower tent for better usage of light. going to do this in a trailer so electricity,wattage (dont want to blow circuit/fuse, or catch mobile home on fire) plan to save about 1000 dollars for startup as my first harvest should be worth it. anything to make sure my trailer catches on fire. main concern is tent size for 600 watt, and tent size for t5 (veg) have been studying this hobby/topic for months now (on and off). a big concern is electricity, size/wattage of tents for veg and flower, and something to make sure my GFCI outlets dont create a fire, i guess trailers are wired crappy or something. hoping this is a good plan and wont create a huge amount of suspicion due to usage of electricity. i plan on tents, not building anything, tents are mylared, easy to set up and tear down, lightproof, and good for smell with vent holes.

any tips on good places to buy lights, secret jardins (flower only-600 watt hps), seeds, and any other helpful tips would be great thanks!!!!