Based on a very recent experience with my coach, I would suggest you check for wire damage from a rodent. One of the power leads off the alternator had a small break in it where the son-of-a-gun had feasted on it.
Not sure what model years the windshield frame rust problem was present but there certainly was a lot of news of it in the mid 2000's. My coach was a 2005. If you Google "Winnebago w/s rust problem" you will get a lot of info.
Doug - Prior to our present motorhome we owned a Sightseer 29R which is very similar to the coach you are considering. Over four years of ownership, we had very little problems with it but would caution you to check for rusting around the windshield ...
Interesting thread since I'm going thru a similar situation presently. Alternator quit working for whatever reason and need to drive to my dealer 10-12 miles to get it looked at. Plan on running my genny which will keep the battery charged as I drive...
When I got my current motorhome it came with CB wiring in place. Since I had a radio from a previous installation, I wired it in. Use it about 5% of the time in our travels and then only for entertainment, listening to "good old boy" trucker chatter....