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You'll need to contain the plants inside a grow room or tent, then set up a way for fresh air to get in and smelly air to get out. You'll need a fan or blower to move air from the in-vent to the out-vent. On the out-vent end, set up a filter that the air has to go through, which will clean the odor from it.

An expensive but easy/effective way to do this is to buy a carbon scrubber with fan like this: http://www.amazon.com/gp/product/B004Q2ER5C

A much cheaper but DIY way is to set up a good fan and make sure all air passes through one or two layers of carbon filter fabric like this: http://www.amazon.com/Cut---Fit-Carbon-Pad-Purifiers/dp/B000U204W2

Edit: if you haven't looked at tents yet, there's a good selection at amazon: http://www.amazon.com/b/ref=sr_aj?node=3480699011&ajr=0 - they make it much easier to control venting, lighting, temperature, humidity, etc. For 1-2 plants, don't go smaller than 4 square feet, and give yourself plenty of height.

LED lights are fine if you have the budget for them, but if you want to use the entire 5x5 tent, you'd want at minimum, 2 900-watt LEDs (preferrably with 5-watt LEDs for better penetration). Nothing wrong with Mars Hydro. You could always just buy 1 to start, and use only half the tent.

A Single 1000-watt HPS light with a vented hood and 8" fan is what I use in a 5x5 tent with good results.
Ballast: http://smile.amazon.com/gp/product/B00WAKP4YK?psc=1&redirect=true&ref_=oh_aui_search_detailpage
Hood: http://smile.amazon.com/gp/product/B00BMVK8HG?psc=1&redirect=true&ref_=oh_aui_search_detailpage
Fan: http://smile.amazon.com/gp/product/B00GYG39UW?psc=1&redirect=true&ref_=oh_aui_search_detailpage

You would also need, bulbs (MH for veg., HPS for flowering), hangers, ducting for the vented hood, and optionally a carbon filter if you want to control smell. Also, professional growers typically replace their bulbs every 6 months because they lose that much brightness over time...so you might want to factor that in.

One final note is that LEDs do have the advantage that you can grow taller plants...as they are lower profile, and you don't need the same amount of space between the tops of the flowers and the light.

Oh, and what the LED lights draw from the wall is different from what they are listed as...typically they draw about half the amount they are listed at. So an LED that is listed as 900 watts, is actually using closer to 450-475 watts of electricity. The general rule of thumb for lighting is that you want a 35-50 watts of light power per square foot of canopy (for LEDs, you would use the amount of power actually used for this calculation).

I'm using a carbon filter like this one and it seems to be working well so far. My garage still smells faintly of fresh herb though. It smells delicious but you can definitely still smell it.

If it becomes more of a concern I will switch to a better brand filter, I've heard "Phresh Filters" are the best out there, but they are quite a bit more expensive than the cheapo one I'm using. If it's critical that you mask all of the smell, then I would recommend investing in a Phresh Filter.

I have two of these
http://www.amazon.com/gp/product/B00PH1MQV8?psc=1&redirect=true&ref_=oh_aui_search_detailpage
and one of the Mars
http://www.amazon.com/gp/product/B00XC3LBI2?psc=1&redirect=true&ref_=oh_aui_search_detailpage

the first one - galaxy hydro - is much purpler .
All three are in a small area - about 5 feet by 3 feet
I have 3 plants in there and they are doing great.
My total wattage consumed by the fans and lights is under 500w so obviously the advertised wattage is not accurate (3x300"watt" leds producing under 500watts?)
however they are SUPER bright and the leaves are deep dark green.

https://www.amazon.com/PG279Q-2560x1440-G-SYNC-Gaming-Monitor/dp/B017EVR2VM

https://www.amazon.com/ViewSonic-XG2703-GS-G-Sync-Monitor-DisplayPort/dp/B01LWJMM1S

https://www.amazon.com/Acer-Predator-XB271HU-2560x1440-Display/dp/B0173PEX20

I'd trade a lb for any of those monitors.