@Ivan Enriquez it all depends, what size and font your signs are and where you put them are all factors that determine if your signs get noticed in the first place. If someone is really motivated, they will call on anything that has "sell your house fast." Where you are located has a huge impact as well, when I used bandit signs the leads were not that great, a couple here and there peaked my interest, but were not solid. It is tough to qualify bandit sign leads, but that's not to say they don't work. Your municipality could also be strict with bandit signs and might: take them down, give you a fine if they see you putting them up, call you to try and give you a fine or all of the above so you should check with your city first. Since you are strapped for cash, having enough signs is going to cost you a couple hundred bucks. You probably have friends in college so my suggestion would be to find the ones who have delivery jobs that are constantly going to different neighborhoods. They see all the houses on the block and can give you addresses for the individual type of property that fits your criteria granted to explained to them what to look for. Give them $500 of your profit, and everyone is happy.
Hope this helps, PM me if there is anything else I can do.