Even the shoddy wet food would be inching towards the expensive side (in addition to what we already spend on pet food), so if it were me, I'd invest in a decent grain-free kibble instead.
It doesn't have to be anything fancy, just avoid the really bad stuff like BHA/BHT, dyes, flavorings, and so on.
I did that with every feral we came across. I'd love to feed wet food if I could, but honestly, I'd much rather feed kibble than a cheap wet food packed with all sorts of dangerous ingredients. (though if you can afford a decent wet food, then go for it!)
Proud parent of Scamper (age 12) and Robin (age 4)
At the rainbow bridge: Slippy, Faramir, Gabriel, Lucky, Ammy