If you want an inexpensive incubator you can make one yourself. To make one you can use a styrofoam cooler, heat tape, and a thermostat (you can get a decent Inkbird one for about $30) or a rheostat. I've been planning to build one but haven't needed to yet.
Also, the one I mentioned earlier was about $50 and I've had good experiences with it. I haven't used it enough to claim it's a good incubator, but the person I got it from said they had hatched hundreds of leos in it and it worked great.