For one clutch build your own out of a cooler, I did that way back when using a cooler that was holding 8 clutches total.
Reliable incubator are pricey best would be Nature Spirit and Hotbox (see C- Serpent website)
Cheap incubator are often too small and or made of Styrofoam but with untrustworthy heat elements or thermostat.
The most important piece of equipment is a reliable thermostat and that will run you around $100 (I recommend Herpstat) for everything else check our DIY forum.