Keep in mind the same thing will play out with any new machine you get. They are all computerized and software becomes outdated so the makers stop offering support/repair for the older machines.
This is true of our computers too, unless we only use them as word processors. The software is continually being updated and pretty soon our computers are boat anchors. Nature of the beast.
Anyway, sit down and try a lot of machines.
And if you are doing that many blankets, the church should kick in with some moola.