I would not pay more tha $25K
Right off the bat you need the following.
Tires X 4 = $1500 Installed I recommend Toyo open country however the MTR'S look the best on the H1 IMO.
New Mirrors = $500
New Hummer H1 2003 Rims 17" 2 Piece = $3000 The 95 Steel Rims are 16.5" and ugly again IMO.
Brakes = $600 with labor both F and R.
Geared Hub seals = $600 with Labor
Total of needs in my opinion to get the Rig looking very sharp are approx $6,200. Now if it needs anything else I listed you may need around 3 to 5,000 more. At the end of the day with all the mods and ups with 10K in the rig you now have an AWESOME H1 ready for the show and Off-Road for $35,000. NOT BAD NOT BAD at all.
-PEter