Basically, as an economic project the answer is NO!, NO!, NO! Like any other car project, if some manufacturer has actually made what you want to wind up with, buy it, don't try to make it at home. And I say that as someone who has made several home projects which were successful.
If the journey is more important than the destination, i.e., you're doing this because you like the entertainment of working on stuff and you're willing to pay for that entertainment, then it's a different matter.