Here is what I proposed:Setup fees : Administration Setup:One Time Fee: $400Guidebook: Using professional photos give the guests a professional tour of the house and how the home works (Wifi passwords // How to use grill // How to use propane fireplace // Hot tub instructions // Sauna instructions //Check in and check out instructions //where extras may be storedOTA (Online Travel Agency) setups: taking professional photos and actively updating your listing on popular platforms;PMS (Property Management System) Setup Smart Pricing Set upWebsite integrationOther (furniture arrangement / design / décor shopping and set up) $50 per hour· Placement fees · Marketing Cost: Variable depending on needs/wants for marketingFacebook AdsGoogle Ads Cleaners: Set up procedures/take pics of expectations· Management fee—30%Guest communicationCleaner communicationSetting Rental rateDealing with small maintenance issuesBooking CoordinationSmart Lock integrationKeeping supplies stocked (TP, paper towel, all cleaning products, coffee, filters, creamer, sugars, teas,)(Receipts would be submitted on a monthly basis for either reimbursement or book keeping purposes)Encouraging guests to leave good reviews by periodically checking in, providing a review template, and ensuring guests receive the amenities they are looking forContinued marketingMajor Maintenance fees—OwnerCleaning and laundry services fees: Cleaning fee to the guest depending on how cleaner wants to charge

If your contract doesn’t state terms for additional access, then I understand his concern, maybe ask if you can video the interior, although most tenants won’t want that.

Does anyone have recommendations for ADU design and construction companies in San Diego county?

Do you like design?

I have done interior ivy walls, ice cream makers, fresh squeeze orange juice, and even converted an outdoor shed into a "Van Gough Art Studio" to give 1 house a leg up.

Maybe have a golf shirt with a customized design or wear a novelty tie that speaks to your personality.

The other half is: excellent finished product design and management at a reasonable cost. 

I just designed and finished installing a 1314 sq foot home.

It's usually 45-60 minutes instead of 15 however, and a local rep or property manager can be the "designated agent" who is required to respond to nuisance complaints within the given time period.

Hard money loans are often short-term and designed for projects with a clear exit strategy.