We have central air and sometimes the AC doesn't cool enough in extreme hot weather situations.

We only keep a number count of a few items like hot tub filters, special items for certain guests, etc.

Maybe % of purchase price (though that would mean low estimates for killer deals, and higher estimates for hot market properties)?

The property is in shaded area so it is really not super hot inside.

Put hot embers in trash can.  

If so that can work in very specific red hot markets.. however experience has dictated to me over the decades that land can take a long time to sell .. many times has to be sold on contract to move it.. or if its cash you have to have the lowest price parcel of any similar ones on the market to move it timely for cash..

I don't want it that hot in here!"

No where for me to put a hot tub.

Bloomfield has been hot for years @Jenntyng Chern.

I scaled up my portfolio from 2 to 6 this year and a little concerned to grow more right now as the housing market is hot right now and I do not want to get into trouble if there is a big correction.