Welcome to RC aviation, jason!

Couple of ideas/thoughts for ya here...

1) Several have suggested a hollow core door. While I agree that doors make great build tables (I use one myself), and CG's idea of using portable sawhorses to hold it is a great one, I WOULD suggest a solid core door, rather than a hollow core one. Hollow core doors tend to sag, bend, or warp over time, particularly when only supported at each end as sawhorses might do...this can lead to some annoying issues when building. granted, solid core doors are heavier, but ime, worth the hassle. if one's not practical, at least be aware of the issue and check your table often to make sure it's flat and straight

2) As others have aid, working on a plane outdoors won't harm it a bit...whadya think we do at the field? I've done several builds in my garage, and always during the warmer months have the garage door open to the outside...no issues.

3) Storage : Don't forget to think "up". There are dozens of creative ways to come up with some method of hanging planes from the ceiling, rafters, whatever. If you're interested in seeing my own particular method (certainly not the only or best...but it works for me ) let me know. I'll provide some pics and such.

Hope some of that helps...good luck!