Which is why no technical information is distributed in the open areas of this forum.
You've got 3 options:
A. Replace it.
B. Throw some parts on it, make it last a little bit till you get some cash. Only down side is, you've basically used that cash to "buy time".
C. Don't do anything untill you get the cash.
Beyond that, can't really help you.
What I will say, is having a guy come by that does HVAC "on the side" is diffenetly not the way to go with things.
ESPECIALLY with a new install, if you choose to go that route.
Nothing against handymen. They have their purpose. I just wouldn't call a plumber to fix my furnace, or a furnace guy to replace my toilet.