Inverter

Thank-you all for your input and suggestions. I have looked on line and new Freedom458 Inverter/Chargers seem to run from 1000 to 1500 dollars with a new remote control board approx. 150 dollars but my question is what does the word Xantrex mean, this word is now part of the name of the inverter, for example Xantrex Freedom 458 Inverter/Charger? I take the motorhome to my mechanic on Monday. The prices I see for the new inverters even with labor should keep the cost well under the 3000 dollar cost he thought it could cost. My last question is how hard would it be for me to change out the inverter, and I am no means a electrician even though I changed the battery in my jeep.