Kinda figured it was all ready said but take your time in doing it. Most any of the above ideas will work depending on the type of tint. The most difficult film I have tried to remove is the type that has teflon in it to help last(its not as easy to peel off when the windows go up or down). With that type you'll need ALOT of fresh blades,high quality type,plenty of soapy water as warm as your hands can stand and as many calm pills you can take,LOL. It is very time consuming to remove that style of film.
Since its a 97 Suburban I'd be willing to bet the windows from the rear doors back,except the tail glass,are factory tinted and you'll not be able to remove it unless you change the glass. My adive to you is go with her at night for a while before you remove the glass and ride some daylight hours to. I'd be willing to say once she see the advantages of the front tint she'll accept the window down to back up at night. Had the same problem with Mrs Hammer when we bought the last car for her(our old LHS). It was tinted and after a few weeks of driving it she had me leave it on. Then when we bought her Durango a few yaers ago and it was not done did I catch it for being to slow in getting it done to the new truck. Hope she enjoys the large taxi... ... ... . Andy