Unique has been done 1000 times. The pile of crap inspiration has been done 1000 times also and they all fail.
You are looking for a cheap bike to customise. Cheap custom bikes don't really exist, even 125's. Even your time is not for free. Any good bike costs real money.That's the way you work. I'm sure there is people on this forum who are not here just to put people down (maybe it makes you feel better about your self) and act like just because someone has a budget means that they can't afford a better bike. I honestly would rather buy an engine to swap in my car than buy a bike. If I spent $3000 on a bike I couldn't justify that to myself because that could be a new set of wheels of my car.
Focus on your car if that is where your money/time/energy is going to be primarily focused. You seem to think that building a "cafe racer" or even working on a semi project bike is some small, simple thing you just do in a weekend and it's just not the case. It takes real thought, real engineering, and real work. If you are going to juggle 2 projects at a time all you are going to do is steal from peter to pay paul and vice versa. Focus on one thing at a time.I just looked up a picture to show as reference lol . I'm saving my money to build my car which is what I'm passionate about but also want a bike to putt around town/take to shows while I'm working on my car. No need to be rude . This also isn't my "dream bike" just something I car ride/build this summer then sell it and either get a bigger cb or build a bike from scratch.