To answer your first question...the topic of your post...i.e, Are you Crazy? I don't know; you probably are crazy if you're thinking of getting a horse.
I'm not as experienced as some others who responded to you here, but I'd have to disagree with some of their advice. I was raised around horses as a child, so there was some bit of instinct/knowledge lingering, but as a child, adults always took care of the things that one might have to face as an adult horse owner. And I only have 3 minis on which to base my opinion (well, 4 if you count the one that was put down.)
We got Nicky (avatar photo) from some rich people's bankruptcy auction; I figured rich people would have good bloodlines and would take care of them. At the same time, we got a mare; she became ill within a couple months and was put down--so much for the rich people. So then we got a Craigslist mare. She hopped over the stall door and Nicky got her pregnant. In order of my preference for ease of handling, the first one is our baby (3 years old now); Coco (the Craigslist mare) had maybe 8 hours with Baby, and then we were all in there handling the baby. If we need to do something new around here, I always get Baby to do it first. The next easiest to handle is the stallion, Nicky. Last in the ease-of handling is the mare, Coco. We got Coco at around 4 years. She didn't and still pretty much doesn't even like to be touched. So to answer your question, I think I would prefer a younger horse; even at 3 years, Baby is still pretty open to new things.
By the way, "everybody" on the internet seems to feel that stallions are a liability. I am always more concerned about Coco, the mare, vice the stallion because she's "wilder."
That said, I'm not advocating you get a couple colts and leave them uncut. I suggest that it is your decision. One option for gelding, that I can think of... around here, sometimes there are gelding clinics. I've seen costs of 50 or 100 dollars. That is strictly for gelding, not for any aftercare or shots, like tetanus or whatever. And usually you have to pre-register.
Some other thoughts....
Use your common sense. If their hooves look bad, I'd steer clear. Horses spend much of their time on their feet; I just wouldn't risk it.
You didn't mention whether you wanted to show; so you could call around to breeders; somebody might have one available that is not show quality, but would be perfect for your needs at a better price.
NOOOO on the tater chips. The lady that sold me Coco was feeding her Triscuits (and goat food) ....god did her poop stink.