No wonder nobody does hardware startups. It seems unrealistic that you'd have a prototype that anyone would be comfortable paying for within a few months, unless you're selling something as simple as a pre-programmed Arduino in a box.
The machine consists of a base depositor that can be purchased on its own for about $2000-$3000. The heating elements consist of a few metal plates worth maybe a couple hundred dollars, a couple of off the shelf temperature controllers worth less than $100 each and some housing and circuitry for the controllers that's can't be worth more than $1000. Overall, I'd say the temperature controlled depositor has maybe about $7000 worth of parts in total, being generous.
That's a decent markup for something comprised nearly entirely of off the shelf parts.
If you're thinking "No one would pay for that" without asking customers then you're doing it wrong. Let the customer decide what they're happy to pay for. Some of them will give you money even after you've made very little progress.