New to bodywork HELP to choose correct repair method

[ProTourGSX]

I have an A-body ('70 Buick GS) with rusted out windshield & rear channels, and lower driver's side 1/4 panel, trying to make final decision for correct repair:

1) CHEAP but effective: Do not replace roof panel; cut out rusted metal window channels; fabricate & weld in replacement panels

2) CHEAP but effective: Do not replace full 1/4 panel, only lower 1/2 with patch panel

3) A Little more EXPENSIVE, BUT ALL NEW METAL:
Buy new roof panel (Tamraz's/$300), with new front & rear window channels, and new full 1/4 (including door jamb and partial roof), and rear deck filler panel (for lower rear window channel replacement

I am capable of doing the repairs, although this will be my 1st time, and I expect only to do it ONCE on this car (due to it's rarity/value).
Paying a Professional Bodyman is NOT an option, so WHICH method would you recommend?

Pics of damage, here:
https://www.pro-touring.com/showthread.php?75627-Pics-of-Stage-1-project-car

[dhutton]

I would go with option 3 judging from those pics. I think there might be more rust there than you think.

[tb8125]

It might cost more up front but it will be done right

[Finch]

There is more rust you cannot see so full panel replacement is a must. In the end it will save you time and money as the body work will be much easier.

[elitecustombody]

#3, no questions . Get it done right the first time