This one is $50 cheaper, looks the same as the one in your link and holds 54 guns.
Winchester Big Daddy Gun Safe (2012)
Although, you just might like the idea of one of these:
BedBunker Concealed Gun Safe
( In know the bed Bunker is a little over your price point, I just put it here for you to think about.)
Your best bet really might be to get a Modular Gun safe and then if you have a basement weld 1" Dia. S.S. bars about 18" long to the sides at the top & bottom.
Excerpt form this link:
Modular Gun Safe - The Do-It-Yourself Option
"First, the cost is a little less expensive, just under $900. But cost is not the key factor. Many people want to be able to purchase and set up the safe in, almost,
complete anonymity.
Most people have neighbors.
When a big semi tractor trailer truck rolls up to the house and delivers a 1,000 pound gun safe, someone's going to notice. You have to hire someone or arrange to have a friend (or three) help you wrangle it into the proper space."
Then cut out the floor, drop in safe and then lay in some S.S. mesh and concrete around it.
Be sure to sink it deep enough to be able to cover it with whatever matches your existing floor down there. It'll have to be fashioned to accommodate the door handle & hinges so that they don't protrude through or into the floor panel covering it.
You might already be a member here, but go check out the thread at this link anyway
Gun safe lining - Page 2
Excerpt:
"BTW, if you want this to be a fire proof safe (or more accurately a fire resistant safe) I'd box the outside of your cool rolled steel box with several layer of gypsum board (i.e. sheet rock or drywall). That's what commercial fire safes use (they actually have two layers of steel (one thick and one thin) and put the gypsum between the layers. If you just boxed the outside with several layers of 5/8ths Type X Drywall you'll get several hours of fire resistance. You can figure roughly 1 hr of fire resistance for each 5/8ths layer of Type X. Note that you'd have to sheath the door as well to get your fire resistance. Ideally after you put your drywall sheathing around your cold rolled steel box you'd cover the whole thing with some reasonable thickness sheet metal (galvanized or plain steel, not aluminum). Just sheathing with drywall will help tremendously but it helps to have an "over box" so that if the drywall crumbles in a fire (and it will) it won't fall away and expose the steel. "
Then just have a few weapons placed strategically around the house for protection while the rest of your Armory is both Hidden and Secure.
Just a few quick things I thought of and found for you in like 10 minutes.
Lulz
