It's a finer line than you think to fit in the 12% tax bracket (it's easier for couples, obviously). Unless what you earn is completely tax-deferred, your earnings plus your conversion could push you into a higher bracket. There's also ACA subsidies to worry about.
But, yeah, I did it last year. I worked a short contract and did a conversion. The contract money paid living expenses and filled up my IRA and HSA.