C.A.
Is there an IKEA around you? They have an inexpensive train set in their children's area with tracks that are pretty compatible with the Thomas trains. Also, (ashame we don't live closer because I have a ton of Thomas I would like to get rid of) have you tried Craigslist or Ebay? I just sold a $500.00 dollar train table for $100.00 with trains. The mom who bought it was thrilled (so was her child) and I was thrilled to get it out of my garage.
The tracks on the table were glued down or screwed down on a large thick board. We bought it that way years ago but I can't imagine it was that hard to do. The board was painted with 'grass' and a lake and roads around the tracks. Quite cute.
Good luck... there is no reason to buy new.