Starting w the low $ route.
Revived an old, thought to be dead, 64 bit PC (has WIFI to connect w my router).
Ordered
a 5 lev mag resistance trainer new, Ebay $40 (Bike Lane Pro Trainer in USA, includes shipping),
a speed/cadence ANT sensor,
an ANT dongle,
a vga to component cable (to connect PC to TV in my exercise room).
Now I wait for stuff to arrive.
Next to get a lazy susan bearing so I can swivel the old CRT TV from facing rollers to trainer to my wife's stationary exercise bike.

Will 200mbps be fast enough for the internet connection?