Looks like a nice project. The tubes really dont look too bad.. I would say your best bet by far is to fix the tubes. These are glued on, and its quite a process to take the old off, fit new strips, flip the hull over, and fit new tubes.
If you are thinking about new tubes, talk to Paul Tilley at Tidel. He's in the UK so shipping will cost you, but he has done lots of Sr6 tubes. You are still looking at 6-7k easily.
I've refurbed a few of these. The console base does rot, no problem just flip it over, dry it out, and do some fiberglass work. What you need to look for is water ingress into the deck and transom wherever there is a hole or fitting. There are lots of holes drilled in the deck aft of the jockey seat splitting into a Y because the cables were originally routed through channels screwed into the deck, this is probably where you'll see some flex in the deck.
The boat is definitely worth refurbing, they are a ton of fun and VERY capable for their size. I've had mine out in some really nasty stuff, and I was totally comfortable with it. Unfortunately they don't sell for too much. Something like yours I wouldnt pay more than maybe $1-2k for if the tubes are fixable and the transom isnt rotted out. All outfitted with older 2strokes and ready to go in decent condition, maybe $10k. Outfitted REALLY well maybe $15k+.