Sounds like your buddy has a badly setup system if its drawing more than 30a through a 30a cord without tripping a breaker. Our rig will shut off the fridge and water heater to kick them over to propane if the load is too high for the type of connection your on, which it auto detects.
Time will tell how the titan works out. I didn't buy it for AC, but its nice to be able to run AC for the pup for a while while we're out. Now with 2x20amp fast charger that come with it, I can plug into any family member or friend's normal 110 receptacle and easily power everything in the RV. Between the solar and the 110 plugs, we can plug into any normal house, and have power like we're on a 30a connection. The fast chargers automatically turn off when charged up.
Microwave, coffee maker, and all appliances work without firing up a 5500w onan in the 5th wheel which is noisy. In the slide in camper, the very small yamaha (28 lbs) is just there to recharge it when the solar isn't enough, but we still have a full range of power via a 3000 watt, 6000 watt surge system that literally just plugs in. To move between the camper and the 5th wheel is a matter of unplugging and plugging into the other one. For us, it was a no brainer.