I wouldn't charge the tenant for that.The second leak was abuse/neglect, so I would definitely charge.

One thing you might think of doing is having and promoting your own website to avoid the exhorbitant fees charged by the third party sites such as Expedia, Booking.com and Air BnB.  

what would be a good price to charge for these things.

Once I sell that I’m gonna convert to a fourplex and do the ADU.going through cash quickly and also using credit cards when possible like to purchase materials.

You can't just take what you paid and start charging interest on that figure, because part of what you paid was already accrued interest.

Generate a comp set in Pricelabs and you can go into finer details on what others are charging.

In addition, he answers all sorts of questions for me throughout the year and doesn’t charge us for that.I see many of my friends leaving way too many expenses on the table.

That said, delivering this level of quality requires a significant investment of time and attention on every engagement, which is why I simply can’t charge low rates.

If you have a buyer's agent, you should have already signed a buyer's representation agreement and that fee/commission is disclosed in that document so you should very well know what that charge will be.If you were the seller and going to owner finance the property, what would you want to see from the buyer that tells you that they will be able to pay the mortgage moving forward. 

For example I don’t know of any say plumber that charges $120 an hour but brings two guys and charges $240.