We have decided to buy a TT as we spend quite a bit on hotels, but we've also figured it would be a good way to reduce our costs for awhile so as to focus on paying down debt and saving $$$ for a home...
Fridge and air conditioning? 3kW and a Powerwall lithium battery.
Or run the fridge on propane and skip the air and you need 300 to 600+ watts of solar. Maybe $2 to $3 per watt self install. Then you need more battery and an inverter for another $1,000 to $3,000 depending on size.