Oh, and why treated lumber? If your basement is bad enough to need treated lumber indoors, it's too humid for firearms or reloading gear. Typically using treated lumber indoors is a bad idea.

Just frame it out normally and buy a good safe. Nobody would steal your clothes. Maybe it would be a good idea to quit FN around with the student loan. WTF, if you are in college, wait until you get OUT then build one in YOUR house. Layoff mama's teat..

LOl the loan thing was a joke guys. I have some left over after tuition and such. Got to get me a new laptop to run auto cad as my acer piece of crap wont do the job. Normaly i must out of pocket the money for my books and such. Then i take that money back out of my loan and use the other for what i need for school. I do not think the basement will be to humid maybe alittle. By the time i get it done and we finish out the rest of the basement the only issue will be the concrete. Nothing alittle sealer wont solve. We do not have a water issue. We did once as the drain backed up when the sewer was being worked on that has been fixed so it will not happen again. I figure even if i need a dehumidifier it would solve any issue. Everything is dry down there. I am thinking more of a den as the area i am going to use is about 20 by 15 not 15x15. Maybe a nice little setup. The layout screws me. It is either put the room down stairs or my bedroom. Though i did think about that one.

As for the glock. It was in my closet 7 feet off the ground behind a locked bedroom door. The cousin got in my pass through in the closet under the stairs. It has been closed off and blocked and the bedroom door now has a exterior door lock on it. This is one of the big reasons i want a room for my stuff. He likes to just ''borrow stuff'' His step dad gave me my luminok and said he found it on the driveway. My bow had not been out side for 4 weeks since gun season had started. Rain ice snow mud and it lookd clean as it was new. Funny thing is the arrows where back in my case three weeks ago so he had it for a few weeks.

You may not need treated lumber for the wall but you should use it where the framing comes against the concrete . Bottom plates and first stud on vertical walls ,it cuts down on dry rot and termites . 20X15 sounds big but you will be surprised how quickly you can fill it up

Sounds to me that you just need some Rubbermaid containers of varying sizes to keep all of your stuff in.

Worry about the gun room after you buy or build your own house.

If I was 24 and still lived with my parents then I'd be worrying about getting my own place, not putting together a gun room in my parents basement.