I was going to move anyway, mostly out of boredom and I wanted a place closer to the heart of the city. I rejected several of the houses I looked at solely because I couldn't imagine where the gameroom would go. Eventually I bought a ranch style house build at ground level and had my man ready at closing to remodeled for a game room and two bathrooms.
No basement, no stairs, not even any exterior steps. My Escalera is for extractions only these days.

I wouldn't think the additional expense makes sense for an out building. Its expensive. But I have radiant heat in my home and I am so spoiled by it that I can't imagine ever living without it. It is simply the best.

I tried the out building but quickly became paranoid after what happened to Rob Anthony.
The way it was set up on my property, (its large) someone could pull in back with a truck and take their sweet time breaking down and loading up games as I slept. Even in the middle of the day it would be unlikely I'd hear anything.
Or if I were to go out of town as what happened to Rob.

This would be an unlikely event I know but I sleep much better knowing my baby's are in house.

Agreed. No dust being blown around the entire home like with forced air. Really helps if you have allergies and pets. It runs silently and is very energy efficient.
And a personal observation, no dry, scratchy throat during winter months from the dry, hot air blowing around.

Hilton, here's decent article to read: https://www.bobvila.com/articles/radiant-floorvs-forced-air-heating/