Is the whole house likely to be contaminated with asbestos now?

If you are interested in MHP in North Carolina that is not on a City or County Public Water System then you can find out at this url  https://www.pwss.enr.state.nc.us/NCDWW2/   if it is already  permitted and can see if it has any violations and/or contamination in well source.  

If it's been leaking for years it could go down way in the soil.You would have to them keep cleaning out the soil until no further contaminants were found.

However your buyer will likely want to get it tested and possibly insured to cover any leaks and resulting contamination.

As much as I dislike insurance companies, I have to agree with the ruling, poor or contaminated materials is not a covered peril, pretty clear that this is a product liability issue.

most sellers are reluctant to allow sampling for fear they will be in worst condition if the buyer finds contamination and then walks. the other question is are you going to finance the acquisition?

For instance imagine if the site has some environmental contaminants below grade.

Possible Title V and ground water contamination issues, may need a new foundation.

If the dwelling has been damaged and needs repairs that most of the buildings seem like they need.. sheetrock, flooring,insulation, wiring,  due from water damage,, which was contaminated water.. they need to also comply and give tenants notice to vacate or be fined if they don't comply.. 

Even worse, what if your well becomes contaminated?