My first vintage build was a Raleigh Professional in Team Livery. I of course thought it was an SBDU Team bike until I learned a bit more about the serial numbers. Still...it's a Worksop Professional, it could have been a LOT worse (like a Record). I used 27inch rims instead of 700s on the build, I replaced the Reynolds decal (and used the wrong Reynolds decal) and I bought most of the parts from ebay. I spent quite a bit, probably around what you spent, and I consider it tuition.

I got better at it and you will too.