Hi jhays, welcome to Iboats
I cant speak for dallas area, but around here, the 1800 would be the average price, 3k is way over the top, unless they are filing the tank for you too lol...keep in mind, the ist time a boat gets a bottom coat, is the most expensive, because they need extra prep, a barrier coat, have to set the water line correctly, ect.
whoever u use, I would conform they are using a barrier coat, and verify the product they are using, theres a wide range in prices for the paints...depending on beam size, you shouldn't need more than 3 gallons of antifouling and maybe 2 gallons of barrier...the material cost should be under 1k depending on the brand....most ppl have the 1st time job done by a pro shop, then do it themselves every other year. for ablative paints..(easier to DIY for recoats)
Good Luck