I am not a RVer, however I have an extensive background having multi-meters in an industrial setting. Ruggedness was an important issue, accuracy not so much.
Are there circumstances in an RV where it really matters if the measured voltage is 110 V vs 113 V? 100 Meg Ohm vs Infinite? 74 vs 78 Amps?
Clearly there are uses where such accuracy would not be acceptable. How about on an RV?
Also, ruggedness might become less important if cost is "Free" or "very, very low cost?"
Just asking, not arguing a case.