For years I used a Cycle Pro folding stand that was more than adequate for the occasional wheel tune-up. Niagara has a Sunlite copy that sells for about $50.

https://i.imgur.com/CNd8WFQ.jpg

As has already been stated, the Park TS-2 is the way to go. There's a good reason why it's the industry standard. If you can find a used one for under $100, you're golden for a lifetime. I personally don't care for Parks cheaper version, the TS-8. Kinda cumbersome to use and only allows truing from one side at a time.

Also, if you're handy with wood, Roger Musson gives detailed instructions on how to build a truing stand and dishing tool in his excellent Professional Guide To Wheel Building. I recommend it.

https://i.imgur.com/LYjQTLy.jpg
https://i.imgur.com/hD7jVU1.png