I come from a data science background, so I'm accustomed to creating models to derive the incremental ROI of each variable.I hear some people saying "get the $10,000 hot tub", and I get that, especially if it's a "table stake" that your property needs just to be considered by guests.However, when thinking about less standard amenities, like putting greens, gaming rooms, billiard tables, pool toys, etc. what tools or methods do y'all use to evaluate if a given idea will deliver a positive ROI?

Cap rates should increase as sellers adjust to present day market realities. 

With owner financing, you can usually put a smaller down payment down (15% or so) to get in, then drive the value through improvements or rent increases to market.I always look for light to improvements and mostly rent increases with month to month leases or vacancies to get the best deals that I can move the rents faster. 

If rent increase is 5% or more, tenant can demand relocation assistance.

I have 2 dependents and will be the primary caregiver for both my parents and his parents as they age so we want to hustle now so we aren't stressed financially by these responsibilities in 10-15years and are able to maintain the standard of living we have achieved with income from our (now) primary business. 

Lastly, this will increase the value of the home.

John Vietmeyer I found some blinds at Lowes the other day that are cordless and comparable in price to the standard vertical.

Usually they break down their standards by zip code and need for the area. 

The key difference is that you can massivly increase the asset value, but increasing NOI.

While it's unlikely we will see such drastic increases YOY if it rents well, brings in a little money, and fits your goals, why sell?