Anyone know how to build a DIY electric composting toilet economically? [View all]

Sticker shock for ready-mades nearly gave me a heart attack. But I want one for the back room of this big old house, and I'd like to be able to hook it up solar. I like the kind where the waste is incinerated to light clean ash easy to dispose of. I'm an old lady and can't do a lot of lifting etc. Couldn't build it myself but I know an awful lot of Mennonite and Amish craftsmen who work cheap.