Heat: - Lock thermostats at state law temp and provide portable & legally compliant electric space heaters.

I see nothing mentioned for permits cost, or any other project overhead like portable toilets, dumpster, dumping fees, site security, and more.

And a plug in would be an even simpler fix, and may provide a safer option than portable heaters.

But before the handyman came in, the tenant reported they don't need to fix it because they started using a portable heater.

We keep on hand portable air conditioning units in these types of situations, but also try and accommodate tenants in extreme cases to pay for a hotel.

They brought a portable ac unit to cool the home until they installed it 5 days later.

A surviving spouse can apply a deceased spouse’s unused federal estate tax exemption to their own estate through a concept known as portability.

A portable AC unit. 

The main reason I made the switch is that it is portable for tenants meaning the credit report/back ground check doesn't expire for 30 days and they can use it to re apply if I deny them.

Sub permitted rustic cabins/sheds/portable buildings on pier blocks, non-permanent/temporary (rv/trailer/tiny home/park model) and other unconventional rental units like tree houses seem to rent almost as well as larger units, especially worth looking into if start up cost is a consideration..