Save your wallet, and your sanity, there is still time to turn back.
Boba is an immensely complicated costume. So many parts, details, and paint techniques go into each version of Boba. A perfectly accurate costume can cost upwards of $2,000-$3,000, assuming you paint yourself. Commission the kit and you're looking at $6,000 minimum.
Check out this post on The Dented Helmet from 2007. Prices are relatively the same, but some have shot up. Prices also vary depending on the level of accuracy you want. Example being metal found parts. You can get the original part, or a resin copy, or a machined metal copy. A part could range from $10 - $300 because of this.
It also takes years to perfect Boba Fett, and you will always have something you can upgrade or fix.
501st Approval can be brutal, especially if your GML knows their way around Fett(Don't even get me started on Infamous Status).
"Oh, but I just want one good enough." Yeah, I did too at one point. $3,000 later and 3 years and I'm still upgrading, fixing, and researching. I'm shelling out money for real parts that no one would ever notice but me and other Boba Fett nuts.
So, you've got years of time and thousands of dollars to dump on a plastic spaceman suit. Great! Here's where to start;
- Pick your Boba Fett version. There are 5 versions of Fett (technically 7). Each version resembles the last, and to an untrained eye looks basically the same. The biggest differences are paint color, but it is much more than that. Each scrape, dent, and paint chip are different. Flamethrowers, fabric color, helmet shape, and so on. Really they are several different costumes that look similar.
- Research. Yes, research. Dig deep, read everything you can. Every single little detail on each costume has its own variations and history. For this, The Dented Helmet will be your best friend (use the search function though, your question has been asked 10 times before). Information can also be found here on bh51512.com, so dig around.
- Research. (Really, it's better to spend months researching than buy a $300 replica prop to find out you can't use it - or it's terribly inaccurate).
- Make a Boba inspired Mandalorian for the Mandalorian Mercs Costume Club. You can get practice painting, weathering, attaching, making, and so on.
Ok, so you are ready to start...
- NEVER buy replica props from etsy and ebay (Two exceptions; "Man of War" and "DVH Props", but you can get their stuff elsewhere). Nothing on etsy/ebay is worth the money if you want accurate. 'Buy cheap, buy twice' is a motto I heard early on. I spent probably $600 on etsy for various parts of my 2015/16 edition of Boba Fett, and all had to be replaced.
- Really you should only buy from known sellers on The Dented Helmet. You can buy everything you need there - but still DO YOUR RESEARCH. Just because a seller says it's accurate, doesn't mean it's accurate for you (example: Imperial Outpost Armory makes amazing Boba plates, but they are too small for me).
- Never stop researching. I'm still learning new things after all these years.