My first furnished lease came out of a conversation at the county permit desk
I mostly buy land and hold it, and I own one small house that came attached to a parcel I wanted. It's been a plain rental for four years at $1,450.
I was at the county permit counter about a lot split and got talking to someone waiting behind me who was pulling permits for a utility substation upgrade. He mentioned his firm was putting two engineers in the area for about five months and the nearest extended-stay hotel was 30 minutes out and running $110 a night per person.
My tenant was already leaving in six weeks. So I asked him who at his firm handles housing, got a name, and emailed her that afternoon with photos of the empty house and a number.
How it went. I furnished it for $8,600, buying most of it in one weekend from a warehouse store and a couple of estate sales for the dresser and dining table. Utilities, internet, lawn, and a cleaning every other week are included and run me about $420 a month. They signed a five-month lease at $3,100, company as tenant, one of the engineers named as occupant, paid monthly by ACH on invoice.
Over five months that's $15,500 in, about $2,100 in included costs, versus $7,250 if I'd re-rented plain. So call it $6,150 more, against $8,600 of furniture I still own.
The part that nearly broke it: they wanted a W-9 and a certificate of insurance naming their firm as additional insured, and my policy was a plain landlord policy. I had to call my agent and get that sorted in four days, and he told me furnished short-ish stays can change how a policy is written, which I did not know. Talk to your own agent about that, it isn't something to guess at.
What I'd keep: asking who handles housing instead of pitching the guy in front of me.