if i was you i wouldnt part with my hard earnt until i was sure
is there anywhere you can borrow a turbo for a bit and have a go on a free trial of some platform
its not for everybody with some hating it and some loving it
i have one and personally think its brilliant that i can go and get on it in any weather without worry and either potter about or enter a race with like minded people , there is also training plans readily available on most platforms if you go that route
as for crank wear , i have had my crankset for years without issue . i would however get a cheap frame as you will sweat and it will rust somewhere , i have knackered front brakes , headset bearings and the bar tape stinks - all my fault for shoddy cleaning but something to be aware of