newtonian mechanics - How much thrust would be needed to turn a hobbyist weather balloon into a deep space probe?

I was reading the article Weather Balloon Space Probes that says you can put your own balloon probe at 65,000 ft temporarily.

Is it even remotely possible to raise the probe high enough using balloons, and then put it in orbit or escape the field using an on-board propulsion system?

Can it be done with easily purchased materials?

How much mass can be added for instrumentation?

How much fuel of is required? What kind?

I know it's kind of a broad question, but I just want to know a rough estimate.