Good on you Salsa for getting a different bike for your trainer.

I am a strong advocate of NOT putting precious (either sentimentally or financially) bikes onto trainers.

Its not crucial to have the same sort of bike on the trainer, you just need a bike that fits you.

Also - about tyres, before we bought the spin bike and had a bike set up on a trainer, we used tyres that were worn out for the road but still had some life on them.

Must be the Scots blood in us... we try and extract every cent from anything we buy!