They are looking to make the move to join up with the adult daughter and so their 7 year old can go to the local school district, which has good ratings.I also learned that the adult daughter is looking to move from her current apartment which is in the midst of a bed bug infestation.  

For illustration purposes, I purchased two side by side 3- unit buildings, each zoned RSA3 (a single family base zoning district's).

I've been renting it out since 2017. 1 story, 4 bed 2 bath in Frisco ISD (very good school district). 2012 old and generally in good shape. 

If they do NOT vacate, the eviction process in 36th District Court takes 90-120 days.So, if you were the seller, how would you react to this request from a buyer?

Here is the specific language from Assembly Bill No. 68:a local agency, special district, or water corporation shall not require the applicant to install a new or separate utility connection directly between the accessory dwelling unit and the utility or impose a related connection fee or capacity charge, unless the accessory dwelling unit was constructed with a new single-family home.If the Planning Department is telling you that you need separate utilities and you're adding an ADU to a lot with an existing SFR, refer them to the above language from AB 68.

These small outskirt cities may develop excellent school districts(like cary in NC) but the industry growth plus school is rare.

Things like job opportunities, school districts, amenities, and personal preferences should be considered when making a decision.

Confirm that all change of ownership documents with the county appraisal districts are updated to reflect your information.

BW is indicted by district court of New Jersey, filed bankruptcy and is in my home refusing to leave after breaking a land contract in every way imaginable.

Often people try to stay in a good school district and will rent a place in the district lines just for that reason.