I think the Arduino remote start is a great father-sun project, Listeroil. My 6/1 Listeroid is set up for remote start via a Picaxe 40x2, a bit before Arduino caught on. I'd probably select the Arduino if doing it today; it's cheap and widely supported; I've used the ATmega 328P (same processor as Arduino Uno) for an inverter design. A good choice, I'm not familiar with WIFI for it so can't comment on that.
FYI- 5V is handy if driving logic level mosfets directly, 3V is much lower power consumption where that is important; not important for your application except perhaps for whatever electronics must be on all the time, drawing down your genset battery perhaps.
If you hit a snag or need assistance, send me a PM.
20 to 50 cc per minute is plenty of flow. I use gravity flow and float valve (all cheap 1/4 inch drip tubing/fittings) to fill a small tank with water level just below intake height, and 1/4 inch tubing with small solenoid valve to a tube up into the intake. Intake suction feeds adequately, flow rate is adjusted by float valve water level. The Picaxe turns on the water delivery solenoid after 10 minutes with load, load sensed by AC current and air compressor pressure pulsations. Turns off if no load detected, or engine shut down requested. I add about 25% methanol for winter. Has been working very nicely, no pumps, to trouble. The idea of intake suction feed was learned here on the forum by a guy who had been using it for years. Adding a float valve lets me have consistent, adjustable flow rate from a small lidded (see through) container, gravity fed from a see through 4.5 gallon tote with lid.
Good to see you here Starfire, your breastmilk/water bit was a hoot. I wouldn't like that water bath for my climate, would cost a fortune in methanol in winter as I expect it would keep evaporating out of the water/methanol mix. Otherwise seems a nice simple method.