Frustrating custom build any help would be appreciated
 

About a month ago I bought a 02 Volusia 800. Guy I bought it from said he was a professional which judging by his shop he did know a bit about bikes but the wiring harness was junk as I soon came to realize so I’d like to get everybody’s opinion on wether I could build a barebones style harness or if I should just dump the $300 on a new harness with all the new connectors which I’d really like to avoid because this was supposed to be a quick project that WASNT supposed to cost me a bunch of money.