In purpose built hotels each room is separately fused. I don't know what the price of electricity was but if we assume 0.10 USD per kWh then 1.5 kUSD is 15 000 kWh, roughly 30 kW continuous for three weeks. It would not surprise me if that would trip a hotel room breaker.
In the US with 120 V domestic circuits it corresponds to roughly 250 A so would need to be distributed over multiple 120 V circuits anyway. US 120 V circuits are typically 15 A (as far as I can tell from a quick web search) so you would need to connect about 16 of them.
You'll trip the breaker and get a visit from maintenance. Do it a few times and you'll get booted or just have to spend the rest of your stay in a room with a tripped breaker.
