http://www.bikeradar.com/road/gear/article/how-aero-is-aero-19273/
There really is some shit spouted on forums...I include myself in that statement.
You'll never be confident or comfortable in an aero position unless you ride lots in an aero position. I know Cougie likes to save his race set-up until a week before racing but he's had years of ridingbut I still find it stupid - still love the guy though.
Number one biggest bang for your buck is training - do this well and you'll go fast regardless. I raced Embrunman on a road bike with no tri-bars and came home in a reasonable time. The guy in front of me at IM France coming into T2 did the same.
So do you need it - no, should you take advantage of this, yes if you can afford it, don't treat it like somekind of precious work of art that can only be ridden if its dry and on a sunday.
Its a bike, ride it. if its carbon it wont rust. Components get trashed on all bikes, i change the chain and block twice a year, accept that willl be the case.
The question should be do I get aero wheels or an aero frame - personally I say borrow someone elses wheels, you can use those without needing a fit. Get the frame if you're serious about saving time or just like shiny things.
As for all singing all dancing turbo trainers - very much a nice to have...I've had mine for 6 years and it cost £80 - still works, still hurts, still boring as hell and I'd still rather cycle outside. Invest in a couple of sufferfest vidoes or search for spinnervals and torrent - you might just find every single video available to download for free in one handy package (apparently)