+1 for turning up on a normal road bike and giving it a bash. You may hate it, so not worth splashing the cash until you have at least tried it out. If you have the engine, you can still put in a respectable effort with a normal road bike and no extras. I have only done 2 TT's and the first one was on a Verenti Millook, which has 'sportive' geometry, e.g. a 195mm head tube!
I will never be a TT lover but will use them for something to aim towards and as a way to measure improvements or losses of sustainable performance.
Absolutely.
I am the same. Today I'm riding to my club's TT directly from work, what with the morning commute, the TT, and the journey home, I will get in around 70 miles of riding. 25 minutes of that will be at FTP+ , I will slot in another 20 minute FTP slot on the way home. That makes a great threshold workout day for me.
All on a road bike. I don't enjoy TT's as much as I do cyclocross, XC, and road racing, so for me it's a way to motivate my training, and there's the social aspect too.
Although I must confess to a hankering after one of these
