I hate having to charge more money and go through a longer screening process with applicants.

First step is to find out if she is charging.

I live in Boston, a very competitive housing market, and it is a standard for real estate agencies to charge a 1 month's brokerage fee when you sign a lease for an apartment through them.

If they charge lets say $3,000 for listing, what do they usually pay buyers agents?

you can charge them for cleaning. 

You wouldn't charge rent during that time, because they can't stay in the house. 

What does your PM charge you in relation to what they charge you for normal long term rentals?

Just one example: here in NH I believe you can usually charge a tenant application fee.

Otherwise, it could affect the type of clientele the home attracts and the amount of rent you can charge.

The contractor was delayed, I couldn't get anyone out because of corona fear, the property manager that I hired took advantage of us & charged us for things they didn't fix, the tenant called the city and they revoked our rental permit, & we had a low appraisal.