"At those kinds of costs...small, dedicated inverters nearer the appliances needing them starts to make more sense...[/QUOTE]"
Ohms Law dictates the inverter needs to be located as close to the battery as practical in order to accommodate smaller cable. Low voltage, high amps means big heavy cable. High voltage, low amps means small wire. To add more complexity the inverter needs a cool, ventilated,dry environment. After clearing all those hurdles you take a +- 10% hit inverting from 12volts to 110. I have 1125 amps of battery stowage and the only thing I intend to invert is TV and cable box, with the 1500watt pure sine wave inverter with a switch to turn off the inverter. Those 1125 Amps only provide 450 to 500 amps of usable power if battery life is factored in, the way I was taught at battery school. The other AC that will stay aboard, ran only under genset is air conditioning, microwave, toaster oven, coffee pot, and battery charger. Next to March Pumps I despise inverters but they are a tool that serves a purpose and understanding their limitations is important. There ain't no free lunch.
As for propane...though some fear, I am disciple. Have an alarmed sniffer, exterior ventilated propane lockers with a solenoid switched near the stove is the only way to go. If electric cooking is a must, cook while charging batteries, heating water and tending other AC needs using genset.