if it was me, so long as she is well reviewed then I'd go. To me it wouldn't matter if they were all outcalls.  The fact that she is inviting you to her place is a decent sign, esp if she does outcalls and doesn't have guys over regularly.  Of course, if she calls an hour before and says the washing machine overflowed and she has to reschedule, I'd say it's time to find someone else.

Giving the fact this lady has issues scheduling with her john so far in advance. She was probably ready for you, when she suggested for you to come see her

personally with someone I'd not seen before and no recent reviews I'd be out after the 2nd car trouble cancellation, and maybe after the first depending on how the communication was handled. If you proceed, do so with caution, and you might consider PMing her most recent reviewers to ask if anything was hinky...but again, keep in mind that year-old info may no longer apply.

If you are queasy about it, then seek elsewhere.  

What's the point in all this if you don't enjoy the experience?

Butt never if I din't already kno her.

Not cautious but paranoid.  

Probably you have control problem.