Asbestos in Spackle - what now?
There are lots of different kinds of asbestos and it’s in all kinds of building products. You’re right to be careful. 

We’ve had our remodeling projects tested for many years (30+) and a testing agency just found it in the window glazing compound..the stuff that holds the glass tight to the wood window frame. That’s a new one for me. 

I guess my point is you probably can’t remove it all...in fact there’s probably some in your in-laws house...they just don’t know it. 

The good news: I didn’t see “chrysotile” listed in your report. I’d get a copy of the original report and have the testing agency explain the different types. Some kinds of asbestos you should worry about and some don’t matter. Spend some time with them until you understand the EXTENT of the area involved (I doubt if it’s the whole house.) We often re-test once we find some “borderline limits” or if we suspect a past remodel project that could limit the extents. 

OSHA requires the construction work site to be free of asbestos if it’s disturbed. We have it tested, removed and then we have the air tested to make sure it’s a safe “work environment “ for the workers. Depending on what you’re doing (remodeling), I’d do the same. 

However, it has to be above a certain level before it matters. Yes, you can have asbestos (or mold) in your house, but it won’t affect you or your children until it gets above a certain level. 

Hanging a picture or two won’t be enough to cause a problem, but tearing out cabinets, could disturb enough that you may want that area abated.