Not true, both apartments i had had electric 220volt on demand water heaters.
For the hot water in the kitchen use the tankless water heater.in fact not only kitchen i am using hot water in washing machine, 2 bathrooms, kitchen and sink and yeah, i must say tankless heater never run me out of hot water.
So, go for tankless one it is affordable and best choice.
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Have a good day buddy!
I have a propane heater, on demand, located in the bathroom. Next to it is a CO2 alarm just in case.
Propane tends to be OK as long as it's working well, we used to power fork lift trucks in the warehouse with them as it is deemed 'safe'.
Cost around RD$10000 for a unit that can power two showers at the same time.