buddyd157; No there isn't a building code when it comes to this stuff. If you have like, 100 pounds of powder than yeah that can technically get you in trouble but there isn't a 'code' you have to adhere to. Some people may personally freak out though (Home owners and landlords, etc.)
You mentioned the cost, so I'll just put some numbers together for you:
Assume you're gonna get into reloading for .44 Mag, it's a great caliber to reload for. So here's the starting equipment cost:
Lee Hand press, $45
Lee .44 Magnum/special die set, $35
Lee .44 Magnum crimp die, +18$
Lee 2-cavity bullet mold 429-200 RF special $22
Lee ram prime priming unit $12
Yes it's all Lee, because they're the cheapest but easiest quality for the buck. They'll last you a life time, don't worry. So with all this minimal cost, that's $132 dollars already spent. But you have everything you need. Next cost to worry yourself about is of course finding brass, buying powders, lead, and primers. Casting bullets, oh my that's a whole other category. But if you have a propane stove, you can easily put together a stainless steel pot, with ladle, and also a thick wooden stick to get the screw plate open, make sure you have thick temperature proof gloves, and a good towel or cloth to dump the freshly cast bullets unto. (again, this is a minimal setup)
You mentioned your age. Indeed, that can be a hinderance. I was fortunate to get into this stuff at a young age, young enough to have too much time on my hands. So I developed a really good feel for how much time and resources you need to have in your life to devote to this. Would I discourage someone from getting into reloading just based on their age? No. It's more the reason you're getting into reloading that is the bigger factor on whether or not you should do it. I'd say retirement would be a great age to get into reloading, assuming that now you have your schedules all cleared up and everything. I mean, overall it's not like reloading takes up too much, but nor should you expect it'll be no time consumer either. It really is a 'feel' for time that us reloaders have developed. Enough time is spent that it takes up a significant amount of our lives, but it doesn't take up too much that we don't have jobs or other hobbies anymore.
This is a long post but I hope it is helpful.