Do they have past experience executing the exact strategy they plan to employ on this property? 

After you execute the agreement, they establish an account for you.  

Even if it's just a single family home or two it shows some rental experience.I would also give them copies of your tax returns for the last 2 years.Wrap this in a package with an executive summary of you and the property opportunity and you're ready to meet with them. 

I don't know AZ landlord/tenant laws, however this approach is very pragmatic:On the day you do your lockout, be ready to execute this plan:1) Your or your trusted rep meets sheriff or equivalent at date and time of lockout 2) Do a videotape of each room and make written notes as to contents, valuables (if any), debris and damage3) While you remain inside the property (important) your locksmith changes locks and secures4) Your "student mover" types move contents for further sorting and inventory anything of value. 5) You may wish to have portable storage (PODS) delivered for large item storage and then moved offsite.The main objective of this is to plan out in advance so that your rental is not held hostage while your rent-stealing tenants get their act together.

(Later on there are plans to execute buy/flip deals in addition to our wholesaling efforts, but that day is still to come.) 

If you don't like that idea, you can rent one of those executive suites for a few hundred dollars a month.One thing that will get you are the fees for your association and MLS, if it's like here.

They manage over 300 units including their own properties and they have maintenance crews on staff.

I have zero experience when it comes to finding and executing deals for investors.

Thanks,Joe Get an authorization letter executed by the seller, if possible have the letter notorized.

Sounds sketchy, but I'd ask for tax returns, executed leases and maybe even set up interviews with residents.