Amazing Tiny House Even Has A Built-In Sauna!

     Being at a trailer park, there are electricity supply and septic system, so this house is on-grid with flush toilet . I am surprised to see a sauna in a tiny house (I don't understand why people enjoy sauna), I am guessing that they pay water utility too. I personally would use the ceiling space for a guest room though having a high ceiling gives one a roomy feeling. How do tiny house owners get internet access ,  TV services, or get their parcels and mails?