It depends on the definition of the "tight budget" and the type of the plane you like to fly.

Gas (or glow) planes - there are some relatively "cheap" (under $300) "everything included" kits. Add to this some minimum required "extras", e.g. glow plug battery, starter, fuel etc. and you are looking at $330-$350.

I herd about SPAD's but have no opinion.

Electric - everything included you can get for about $100 for a small plane (about 35" wingspan).

And there was already a very good advice about asking around - in the club or local hobby shop - they might have something good at a very acceptable price.

Good luck and welcome to the hobby!