I would want to make improvements to all units and increase the rent to market value when the renovations are completed.

She paid us up front for 12 months of rent & then paid herself each month & at the end of year 1 she paid us for another 12 months...she did this until her credit improved. 

--reach out and thank them upon getting the booking and ask if they have any questions--send a "Welcome" email or automated message during the week prior to arrival--reach out the day after arrival to ask how everything was the first night and ask if there is anything that the property needs--reach out at the end of the stay (that morning or within 24 hours) and ask how everything was, anything to improve, anything to add to the house and then offer an incentive for returning guests.My 2 cents,Mike Absolutely stay in your place as Mike said.You will see things the cleaners will never let you know about.We stayed in our PF will putting up the Christmas decorations and found a cracked plastic shelf in the fridge. 

It takes a lot of practice and sucks in the beginning, but if you stick with it long enough and keep improving it will be worth it

Basic staging with an agent usually means they give you insight into how you should:Declutter and depersonalize by removing photos and personal itemsArrange your furniture to improve the room’s flow and make it feel biggerAdd plants, move art, or re-arrange other accessoriesFull-service staging is another option if your house needs more hands-on attention.

I would use the income to slowly improve the house and once you get it to a good spot, HELOC out some money for a down payment on another place rinse and repeat. 

I apologized and said (and truly meant) I'd follow up on it and improve for the future.

Centralize your back office / use remote employees / VA where appropriate to cut costs and improve service levels / responsiveness.  5.

You’ll want to check if your specific work falls under their home improvement contractor licensing, or if there are additional local permits required depending on the county.

What I do see is that a strong screening process improves your chances of getting a responsible resident.