That's fine. Like I said, I was planning on doing a few of those things anyway. I'm not going to replace all of the windows or anything, but a couple of them were slated for replacement anyway, and I was already planning on checking ductwork for leaks, etc.
I also have bahama shutters being delivered this week which are going over every window on the west side (and north side) of the house, so that should help the greenhouse effect quite a bit.
Within 6 months or so, I hope to have extended the porch out and will be building a thatch roofed structure covering the porch, so those doors and windows won't get direct light coming in either (east side). That only leaves the south side whose windows and doors lead to the (not under air) garage... and one bathroom... but I'm even thinking about putting one big mirror across that bathroom wall and sealing off that window anyway since it cuts the bathroom in half and looks at my neighbor's bathroom window.
All of these things should help... just trying to have a system that works now AND works as these things get finished. I've done most of the work myself though, so it's slow going and may take longer than expected to make all the changes.