yes, the few VGA -> RCA adapters i have seen, are very expensive.
plus, if your tv doesn't have RCA input, you'd need to either run it through a VCR, or one of the RCA->CATV adapters.
i will do a google search and see about VGA->RCA adapters.
Here's one:
219$
CableStop VGA to RCA adapter
i did notice some cheaper ones in the google search i did, so i am going to include my search results. you will have to do some checking, and see which ones will meet your budget.
results of Google search for "VGA to RCA"
(NOTE: some of these companies are selling a cable that simply has a vga on one end, and 3 peice rca on the other end. however, some of these companies are listing them as not for computer use in any way, so you might want to read a few, and find one that says it will work in a "PC to TV situation.)