You can but it can take a while. I’ve done it and stuck some rambling on a thread (that i must update).
I think was over a year just getting geometry where i wanted it, then building the jig, buying the material list goes on and on.
If going full suss work backwards, get your shock and fixings/ bearings first to work from.
There’s nothing better than riding a bike you’ve made, be prepared for all manner of grumpy comments telling you what you’ve done wrong and why you’ll die in a minute.
Quite timley as i’m just starting swingarm 2.
@northwind, it can be done you know you want to.