What PM Fees for holding keys & turnover? (Self-managed & remote)

[R.G. Pham]

I am a remote and self-managed owner. Insanity, I know. But there is an onsite contact person who I'd like to have manage the keys and showings while I continue to manage the listings, tenant vetting, maintenance (through my contacts), and payments. As yet, I do not see this situation addressed on the boards, but please direct me to the post if you know of one-- Suggestions on what should the fee structure should be for my key-holder? Thank you for your thoughts. (Please I'd like to address the question itself and not directions to get a full-service property manager. That is something I'm already considering.)