Don't get more filter than you need. Do the calculations. You can save $$ and get a quality with the saved $$. See the link in my signature on fan sizing. I vent my room into an adjacent part of the house no problem. I have a mountain air filter rated for 3 years of continuous use. It was a bit pricy but I have had no issues. So long as you open the door daily you won't need to run the fan until they are 1.5 - 2 feet tall or until they start stinking, which ever comes first. Even after they start to kick a stink I run my fan on a timer rather than keeping going all the time. 1x every 2 - 4 hours.

I don't post grow logs or pictures. I'm crazy paranoid. I did a bunch of out door grows as a kid. I'm on my 4th indoor run. Each has gotten better and better. I use 300w of LED and get a bit more than .6 grams / watt but I'm not maximizing my grow space yet. I'm pretty confident I can get to .8 / watt or better. I've had 2 plants in scrog for the first 3 runs due to males in the mix. This run I have 3. My setup will max out at 4 - 6 plants.

Good luck!