I do mobile mechanic and farm calls for tractors and other equipment and I do some in house mechanic work too. I can pick and choose my jobs and what I want to charge for the most part, but I still get the calls needing something fixed ASAP and it’s time to rig it to make sure it’s up and going that day, permanently or not, it needs to be up and going.
Ive done a hell of a lot on jack stands and a easy up with a tarp blocking sun/rain/snow and made good money doing it. The trick is making sure the money is worthwhile for the time, effort, and the SO having you roll out at random and come back who knows when.