I am looking for a service to advertise and show the property as well as screen the candidates. 

what the other investors told you is probably correct but where you advertise for sect 8 are the same places you advertise for paying  tenants.  

Another option is similar and advertise them as handyman specials, and do the same repair schedule with them.

I actually look at my junk mail which helps me get a feel for who’s who in town, which restaurants are popular, which other agents are dominating the advertising market, and get ideas for others to partner up with like cleaning services, lawn care people, insurance brokers, etc.

If it would cost a certain amount of money and time to advertise and show new potential applicants, you can offer to deduct that amount from the tenant's full liability and see what the response is.Hope that all makes sense.

A lot of property managers are starting to have hidden fees for every detail of their job (i.e. listing fee, eviction insurance fee, advertising fee, etc).

Am I wrong to think that anyone advertised on the BP platform would be trustworthy,vetted and experienced in this type of work?

The advertising copy you attached to your email came out perfectly and will be very helpful.

@Christopher WinklerAlso they are getting very creative now with how they advertise it.

I can advertise as an office, but its likely that a tenant will plan to use it as a bedroom regardless of what I call it.