Some are just fine with it and have a flat fee model for such practices, etc.  

I have another LLC for my anesthesia practice.

I have a roommate, whom I work with and trust, but i want to practice the motions of having a tenant (practice how you play).

I am also recently applied for my RE agent licence to essentially practice buy/sell/rental for not only myself, but other investors with the same passion. 

We don't ever file leases with any court here, but it has been quite a while since I was involved in rentals in your area, so that might have become practice there. 

A lawyer licensed to practice in the jurisdiction can advise as to specifics of what, if any, options are available to your friend, and to advise her in how to weigh any options and the risks and benefits that may be involved.

Here we're some I found online:RealEstateExpress.com has Exam Prep Master for $69Kaplan (Birghtwood) has CA Real Estate Salesperson Exam Drill and Practice QBank- $59FirstTuesday has CA Real Estate License Exam Prep Book and Diagnostic online practice exams- $39Allied has CA Sales Super Prep Online Practice Exams- $79

Standard hiring practice is to interview 3-5 candidates per job you are hiring for.

Please let me know what your common practice is!

From a practical perspective, once a tenant moves in, they are in the drivers seat unless they slip-up (i.e. non-payment of rent).Furthermore, should the OP chose to renovate the unit to a degree that it must be vacant to affect the work, he will have to provide the existing tenant a right of return to the freshly redone home.