i would be surprised if you could find a twin engine formula or baja for under 20k unless its pretty old (1990's). I personally wouldnt buy a boat over 10 years old. Just doesnt make sense for a few reasons: repairs, insurance, reliability, etc. If i had 20k i would go for a descent 28' with a single big block.

anything twin is going to be expensive. there is seemingly too much hardware for a small budget. in many instances these small twin boats have 20k worth of just motors and drives let alone hull, cabin materials, etc.

looked at that boat on 32nd in holland, He wants way to much.
Also looked at http://grandrapids.craigslist.org/boa/2323538536.html could be had at $14,000. White is paint and where they blended in the front was a horrible job. They say that rebuilds have less than 100 hr. but no paper work. interior is rainbow color. But 80mph would be fun

I like the thought of roughly a 28 with efi. That would be a good trailer boat, reliable and easy as a boat can be on gas.