I appreciate all the input.
Trying to find a decent mileage (around 100,000) non rusted 3/4 Ton suburban in Wisconsin right before winter is not a task I am looking forward too. Not impossible, but difficult. I have previously owned 2 suburbans:
An 06 that I bought new. Zero problems until a wreck at 160,000 miles totaled it
An 05 that had 100,00 on when I bought it, kept it until 229,000 miles and rear ending was making noise, decided based on mileage it was time to go. Only thing I did to it was a new rear end at 150,000 and a water pump.
I really like my suburbans. I really thought this one would last us for years, it was overkill on all accounts being a 3/4 Ton. The 1/2 tons I owned before always towed the trailer fine. The second one had the lighter duty rear end, which lead me down the 3/4 Ton path.