Welcome! If you are crazy, then the rest of us here are certifiable...and I have to admit I've wondered the same myself. Once you get yourself one or two of these antique or vintage machines, you're hooked and its hard to pass one by. I have between 75 and 100 machines in my collection. Almost all were acquired in the last year or so.
There's a wealth of info on here from members, so rest assured that there is little you will come across that someone here won't be able to help you solve/fix.
Glad to know there's a dressmaker here now. I have someone to come to for garment sewing questions! I absolutely want to come to Australia someday so I can shop in your quilt and needlework stores. I get a couple of the Australian magazines, and you have some of the best ones down there!!