Travel Strategy
I want to travel across the USA affordably but without sacrificing comfort. Please give me a plan that balances budget and convenience. Include recommendations for transportation (trains, buses, budget airlines, car rentals), accommodations (Airbnb, motels, hostels, house swaps), and ways to save on food, attractions, and activities. Structure your advice by short trips (1–3 days), medium trips (1–2 weeks), and long-term travel (1–3 months).