Gotcha. Sadly I can't really offer any more advice. Everyone I know who uses a heatpump only uses them as backups, and for single rooms. The price hike in electricity has had people wary to use them as a main heatsource too.

I can sympathize though. I'm working on (slowly) finishing my basement too, and more than once thought "if only that dang boiler wasn't in the middle of the room." haha