Given the variability of biowaste available to the home owner, I suspect that such a machine isn't practical.
Develop a means to use a conventional pellet feeder in a common wood heater. This would allow you to use pellets when you are going to be away longer than the normal run time of the stove.
This can be of two forms:
Always present. The unit feeds into a corner of the wood heater, so that you can set it up ahead of time, and it starts to feed when the stove temp drops below a certain point. For this it needs some form of ignition system.
Quick conversion. You decide when the stove is cold whether it's going to next run on a load of wood or a load of pellets.
Look at your biowaste and see if you can find other ways to burn it.
Burn directly. Wood chips and sawdust both will burn fine with a grate, and forced air. Downdraft stoves tend to do better at this.
Form into shapes other than pellets. Fusing is difficult. May have to use some cheap adhesive. I'd give first look at sodium/potassium silicates for this. (Waterglass) they are cheap and environmentally benign.
Note: Insurance companies take a dim view of wood heat at the best of times. You are going to have troubles with any DIY uncertified unit. Consider generating heat in an external, uninsured building, and moving heat as hot water to your house.
This opens a third possibility of having rapid very hot fires used to heat a large tank of water, which in turn can be circulated to the house as needed. Insulate the tank well, and you have a system where you make a fire once every two weeks for domestic hot water in the summer, and every day during a February cold snap.