aww, I think it's a time/money/skill equation.
If you have less money, then it'll be more time and skill. If you have less skill, then it'll probably be more money and time. Less time, then money and skill will be your deal.
For me, I started off having never seen or really touched a motorcycle in person myself in my life. (I sh*t you not) somewhere on here, you can find early posts where I confuse the crap out of people because I mistook my valve cover for the head.

That all meant I had to buy more new parts than I could ever fab myself, took time and money fixing idiot newbie mistakes (valves too tight, anyone?) and because I'm always busy somewhere else (and broke) it took probably the better part of the last two years (three?)
Conversely, the Phoenix project had a ton of time and skill put into it, and is freakin' beautiful... but Spike is a talented individual, and I think his son has more motorcycle experience than I do.

Just do the best you can. I would +1 the clubmans and leaving the stock seat for later. there are a lot of sexy cafes out there with stock seats, so that may not be the most of your worries.