1 method is to buy cheap 100K+ veterans and win as many games as possible in your first bunch of games. then slowly sell those veterans. Your target should be the 5th place..
With all due respect, maybe that would work in Div II, but here's a look at Div IV (where the OP is). He has a
rebuilding Div IV team, he buys 3 $100k+ salaried players and (hopefully) wins an extra game every other week. In five weeks he has paid out a million and a half in salary for those renta-players and won two or three extra games. Not many rebuilding Div IV teams have that kind of money to throw around, I'd guess. And I'd also guess that if they did have that kind of money, there are better ways to spend it.