Absolutely go with epoxy over paint. Paint never works. Like never. Unless you like the look of missing paint where your tires go.
If using acid etching, you will probably need to use a pressure washer to "rinse" all that concrete dust out of the pores of the concrete, otherwise you won't get it all out.
Personally, I don't think there is such a thing as a "1 part epoxy". I mean, the manufacturers can call it that, but it's not a real epoxy in my opinion.
I've had good results with AD Polymers. They have kits which (to you) might seem out of your budget, but it comes with stuff you'd have to buy on your own anyway, and also stuff you might not have thought of, such as spiked shoes and a notched squeegee. Put on the clear top coat and I don't think you'll be sorry.
As far as putting jack stands on it, since those can have sharp corners relatively speaking, it might be good to put a rubber pad under the stands, even on an epoxy finish (or maybe I should say especially on that beautiful new epoxy finish!)