Sounds like you’re speaking off of ignorance. Farm collectivization has led to some severe famines, but after the collectivization was completed those nations rarely saw food insecurity. China still hasn’t had major food insecurity since being collectivized. I think there are ways to prevent that from happening, because it hasn’t happened in every country that collectivized the farmland.
Stop trying to force things into terms of monetary exchange, because it doesn’t fit for everything. The government can provide the machine, since the US has monetary sovereignty (doesn’t owe a lot of debt to other countries) in a fiat currency. This means that as long as the federal government has access to the labor and resources, it can afford to do so by issuing debt to itself and paying it off with the next year’s run of fiat currency.
Now, it’s impractical and wasteful to manufacture all of the different combine heads for all of the different crops that could be grown by every farmer. Establish a library of sorts where farmers can utilize these machines without cost, and can be repaired without downtime (by using a different one in good repair while the broken one is fixed). Food can then be grown and distributed locally and based on need. This will also reduce overproduction and reduce emissions to transfer food. It also makes every place more resistant to natural disaster and disrupted supply lines.