retrolefty:
As others have said, you can certainly use your existing Uno board as a AVR programmer using the arduinoISP sketch. If you do want a standalone programmer here is one that works with AVRDUDE and also directly works with the arduino IDE and is quite affordable. Got one earlier in the week and it functions fine.Radio Control Planes, Drones, Cars, FPV, Quadcopters and more - Hobbyking
Lefty
Thanks for the link. I'm thinking about getting 1 (or more). To me (and you) they are quite affordable but it still is 10% of the budget of OP. ]
Best regards
Jantje