Windows would be my next check-point (less than R1) and then wall insulation: I would not be surprised if they have no insulation inside, but you can do blow-in, which only requires a small hole.A home looses heat in two ways: heat conduction (which you can slow down with insulation) and drafts, which in old houses is usually the biggest culprit.

Upgrades include a fully remodeled kitchen, renovated bathrooms, new durable flooring, contemporary fixtures, and efficient heating and cooling systems.

I work with investors in Huntsville, and there are big things heating up here, as well.

@Mark Ross  don't include heat in rent on an ongoing basis. 

Estimated cost for remaining changes (all new electric, drywall, tile, fixtures, cabinets, roof, doors, windows, heat pump, some siding, and fencing.

Not that I plan to live in or even visit the US anytime soon, but I don't want to deal with winter-related issues like heating, de-winterizing a home etc. 

Installing thermostats with regulated heat control (we pay heat) 3.

Here is a link to a recent allocation from Harvard's endowment: https://finance.harvard.edu/files/fad/files/fy23_hmc_letter....These allocations can help point out asset classes that are getting overheated versus those that are relative values, since the asset classes that are getting over-heated will start to show themselves in outsized allocations within your portfolio.

@Wagner Nolasco Thanks for confirming....Not sure why you are getting all of the heat and not the builder.

Give them enough pressure, heat, or attention and the charming melts right off and your left with the rotten core.