This a point where Amy loses me. Sorry.
At what age or relationship status do your adult children have to be before the parent stops feeling that their home is also home to their offspring?
Two of the Roloff children are married with kids. One is married and probably at least thinking (trying) for kids. The last already is in a steady relationship. Shouldn't the abode whether it be a house, apartment, condo , off campus apartment, or tent no matter what city or state be their home ?
Amy acts like it is "only THE farm" where her kids/grands will come to visit her. I would think any parent would want visits no matter where they lived - whether it be the original birth home, a home after children have moved out, Sr living ctr, snow-bird location home, job reposition home/location, etc. It sounds like a bribe or a threat - "now that I fought to live here , you need to (or better) visit me".
Amy should want to live in the farmhouse because she wants to - no tying strings to anyone else , including Chris. Not because her children will visit her more or visit her without advance invites. And there is no reason she cannot go visit the children - no matter where they are.