Boba is a BIIIG costume, made of 100 individual parts that all have together just right. It's a long and daunting task. It can be done, and it can be done on a budget, but man oh man does it make it tough. My first rendition of a 501st Fett was set on a $1200 budget, and I did make it, but that was all scratchbuilt armor, cheapo helmet, and secondhand soft parts. The end quality was iffy at best, and because of all the corners I cut, I wasn't happy.
I went the custom mando route before building Boba, and I learned a lot from the process! It also allows for more of a creative and personal approach because there's no "wrong," way to do it