If you like your bike and it fits well, why not a bike trainer?
I upgraded to a Wahoo Kickr Core this year and it's about a million times better than your typically wheel on trainer. I got it for 20% off at REI during one of their member sales. Then I pay $15/mo for Zwift from Nov-March. It's still biking indoors (which always sucks), but it's way more tolerable now.