It depends what league you are talking about and what funds you have got.
Out of my list of players
In This Linked Thread all except one are free signings.
The highest wage paid is £180/wk.
This is the basis of my lowly-repped club that won Conference North by 15 points and had a goal difference +77!
They also took a Championship side to a replay in the FA Cup third round, and reached the final of the FA Trophy.
I signed two defenders (Rory McArdle and Robert Pacey)I'd had on loan (but at much higher wages)for free - then reached the Confrence play-offs the next season (struggled for goals in the first half of the season though).
You won't find cheaper - and for non-league football, they are clearly talented.