Why would anyone buy a rack?

I buy! Because I'm a Hotshot......

Personally I don't like working with melamine, and I don't own the equipment or skills to work with metal and make a 'Freedom Breeder' clone. It takes a LOT more skill to make those racks so that the bins slide freely than you might be aware.

I don't know more than a half dozen people who could build the Freedom Breeder racks, actually. I'm talking about folks who could design, build, have the tools, access to the materials, and space to use all of it to put together a rack system that looks like the professional 'pre-made' ones. And out of the maybe half-dozen people I know... none of them keep snakes. If you asked them to make the racks for you, once they figured the cost of materials and their time to build it, it'd probably be similiar priced as the professionally available racks.

I'll be building a rat rack later(I've built a lot of enclosures and stands and a display counter) but that's because it's wire and wood. I can do wire work easily, since I grew up commercial fishing and worked with wire like most children play with crayons. There's plenty of people I know that would not be able to even build a simple 4-bin rat rack, with instructions and pictures. That's nothing against them... they have other skills in life. It's just how stuff works.

I'd rather BUY a rack made already whenever possible. It's the time of building and the space to build in that usually frustrates me. I'm invarably out of the right size screws, the saw blade gets messed up halfway through, I break a drill bit, the cordless drill battery goes dead... just a million little things that screw up the process that makes it not enjoyable for me. I'd rather BUY a used rack than BUILD a new one, honestly. Even if it's more money than the materials. I work, and then take care of critters, then take care of my home, then maybe I get some time for me. Adding several hours of building something I can buy just doesn't appeal to me.

I will be building a new outdoor pen for the monitors, simply because no one builds those for sale. I built the first one, I'll build the second.

As far as the attitude, when you throw some attitude at folks about how 'stupid' someone is, or how anyone who doesn't agree with you is 'bashing' you... well, what sort of response would you expect? When you come in spoiling for a fight, why wouldn't you expect a few people to sound a little irked at you? Even though you walked in with attitude, folks still took time to answer your initial question.

If you just wanted people to agree with you, I'd suggest you start your own website and moderate it so only folks who will agree with you in every way can post there. On most sites, there will be differing opinions.

I can't wait until I have enough money to just buy racks, personally. To me it's worth spending all that money to have something that looks nice (which I can guarantee it wouldn't if I made it...LOL) and does what I need it to. As somebody else said, modifying bins into rat cages is about as DIY as I am capable of.