Tom,
If you hard wire one in the panel area inside the front cupboard (easy to do) then 50 amp unit will do the job, no matter what you plug into. Buying 2 portable ones is not very cost effective. I guess you could use a portable 50 amp one with a 50-30 adapter.
We have a 50amp hard wire unit from CW and it has earned its pay more than a few times. This weekend we had very low voltage 100-105 V and it kept tripping. Everyone else was OK. I put a meter on a few sites and they all had 125V. Turned out a wire on the our post CB was very loose and arcing. Quick fix, but only found by the unit. No one else complained on this site. And the CG didn't believe me till I showed the the voltage readings.
Bill
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