Retrofit electric underfloor heat for small bathroom
What would be the best and most inexpensive way to heat a small (5x6), tiled bathroom? It was previously heated by a crude underfloor hot water system tapped from my old boiler. I have since switched to forced air furnace, but did not want HVAC company cutting into the tile. I did have a heated ceiling fan/vent installed, but the floors are still cold during Minnesota winters. The basement below is unfinished. Could standard electric underfloor mats be attached between floor joists from basement, or would it have to be a special mat? I would not want to spend more than $500 including electrician, if possible. Not sure if this makes sense!