This is crazy....
So many negative people here.
I and my wife are fulltiming in our rig with our 2 kids and a dog.
Our kids are ages 2 and 4.
My kids are happy and don't care. When we talk about the house we are trying to build sometimes my 4 year old gets sad because she doesn't want to move out of the 5er.
We have been full time in our 5er for 17 months. We expected to have our house almost complete by now, but have had some wetland, tidal, critical area hurdles to cross.
The climate is not nearly as intense here as it is in Ohio.
We had a very cold winter this last winter. If I remember correctly we had 7 or 8 days in a row the warmest it got was 32F.
We had no freezing issues whatsoever. We had no skirting either.
I am not recommending to go without skirting, I am only stating we didn't have it.
The winter was fine, no hardships. We played in the snow, built snowmen.
We had a 6' Christmas tree in our living room and Christmas lights hung inside the 5er.
All was well and still is well...
The one thing I can agree with is that living in an RV is not exceptionally cheaper by any stretch.
Our 5er insurance is actually higher that our homeowners insurance was.
Our car insurance went up because we lost some discounts.
By living at your in-laws you will save your current mortgage or rent, but you will gain an RV payment.