If you're thinking about a "safe" meaning a residential security container, and you're "on the fence" about it, consider a security cabinet instead. The RSC's they sell for under $1000 are basically a sheet steel box lined with gypsum drywall. They won't protect the contents in a major fire, nor will they secure the contents from a thief with a basic battery-operated power tool that will zip through the steel in seconds or a few minutes at most. What they will do is weigh hundreds of pounds making it impractical to move it conveniently when you want or need to. They'll also cost you too much for what they offer because they're so expensive to move through the supply chain.
What else they can do if you spend a little more, perhaps $1200 to $3000, is to become a sort of practical showcase. Get one with glossy paint or even a starburst fade or filagree and display it prominently in your living room. It's not my style, but I get why some people would prefer that to the bedliner finish that sits next to a shelving unit with used paint cans and lumber stacked in the garage. You can have dazzling LED lights and a plush carpeted interior. Or if you have all black guns, the interior can be lined with ballistic nylon and molle loops everywhere.
You can get meaningful security with a TL-30 rated safe, but while the weight and expense are both immense, the interior space is not. Even for the cheap RSC's, capacity claims in gun-count are often overstated by 4X. A 30 gun safe is likely to hold 7 or 8 long-guns with optics if you want to get one in and out without banging them all together.
If you just want to store some guns whose total value is less than your homeowner's insurance deductible in a child-safe container that also keeps them out of sight, then all you need is a locking steel cabinet. You can buy more to expand your capacity. Buy an extra one for ammunition. You can get a Stack-On from Tractor Supply or Sportsman's for less than $200. They claim 18 guns, but plan on 5 per cabinet. Rather have a bigger one than more little ones? Get a Sandusky cabinet or several of them from Grainger (or similar retailer). They come 36" or 48" wide and can hold 180 pounds per shelf -- plenty of capacity to hold pistols or a modest amount of ammo. Another good storage box for ammo is the orange Rigid job site boxes from Home Depot. The Knaack ones are even better but a lot more money -- the Rigid's are cost-cut Knaacks. My advice should not be taken for storing huge quantities of ammo at your house. Build a shed far out on your ranch or move it off site.
The steel cabinets use a cheap key lock -- far, far better than a cheap combo lock on a cheap gun safe (got to be the #1 job for residential locksmiths). If you have kids or teens in the house, don't hide the key(s). Secure the keys in a small safe. I like the Fort Knox pistol safes with the KABA simplex combo locks. I've heard good long-term reviews on Barska biometric handgun safes too. Since this is an easy business to get into (unlike gun safe makers, they can ship via UPS), there are lots of players in the pistol safe marketspace. I'm sure there are other good ones out there. Don't get tripped up by the low security of these jobs. Low security is pretty much a fact of life unless you're stepping up to TL-30. If you have a higher risk then by all means get more security.