"

The guy offering to do the work, said I needed a new coil only if I went
to
SEER 12 or higher. And with that, I'd need a bigger blower fan.

No, not always.
if he also going to install a Thermal Expansion Valve? New Linesets?
Anything like that?

No. None of the folks quoting it mentioned that. Will have to make another
round and ask more questions.

Rich