[curiousuburb]

Have you investigated the option to Lease a machine as a stop-gap measure? Some firms will let you upgrade the leased machine and/or apply your lease payments to the newer hardware as it becomes available, helping preserve your investment while maintaining the flexibility to juggle gear more than an outright purchase (with associated depreciation). Small premium in cost versus large gain in leeway. YMMV.

Might be another choice to ponder.