Most of the better designers that I know, including Martin, who designed all those trucks, are using Fusion 360 and I believe they pay for it. I think that's because there isn't another software out there that's free that's better. As for printers, if you want an fdm printer creality seems to be the favorite. I have the cr-10 and it's a very good printer with a 12-in by 12-in bed but you can get the 500 and the bed on that is 500 mm by 500 mm. As for resin printers, I have the wanhao D8 it's not bad but I can't remember the name of the software that I used with it for slicing. I'd have to look when I get home if you need to know that. To be honest, it's been so long since I used either printer that I've forgotten most of what I learned. I'm sure it would come back to me in no time at all, all I have to do is get back into it. But, until then that's probably the best advice I can give you, is to ask around and see what other people like and what they're using.