Rents generally rise over time, and while mortgage rates are high now, they won’t necessarily stay there forever.

It also matters where the home is located, and what the weather, type of tenants it attracts/has been attracting, etc. other factors are.

Just factor the cost into the rent.

But that is calculated after expenses and depreciation is factored in. 

When i was younger I used to help her with renovations on some of these properties.I asked her about 2 years ago why she never went multifamily and she said that she was afraid of stepping out of her comfort zone and wanted to stick with what she had known and done forever.

Flipping a brand new home likely wouldn’t bring much profit - especially after having to close twice when you first buy it, and later sell it.Maybe you have millions to spend and I’m just missing the big picture… but when I think of “income” I’m usually thinking “net income” after you factor in expenses, like purchase price or building costs?  

Aim for $500/mo min and even that won't allow you to tap into unless that's after cap ex, management, vacancy is factored in.

He bought it for $33k forever ago.

(Of course, there is a factor that higher rating will increase my booking but that is not just coming from adding one or two amenities) Besides item 5 and 6, I am not sure how much other items will attract more guests to my business.

If it had been my client buying this property, they would have paid a lot less even with the full commission factored in.