Glad to hear that you got your health back in order. Not a fun thing to go thru.
Do you have access to a public library? If so, there are lots of books on kilns and kiln building. Have a librarian help you locate some.... might have to do an interlibrary loan. A few that quickly come to mind: The Kiln Book -Olsen , Kilns; Design and Construction -Rhodes , Art of Firing -Lou , Electric Kilns - Frazer .
While electric kilns sound like they would maybe be "simpler"... in many ways scratch building them is actually a bit more complicated due to the electrical calculations and coil winding that is necessary. (I'm a 35 yera experienced professional kiln builder... and I tend to shy away from doing electrics for cliants myself.)
If you are new to clay, as it seems to indicate in your posting,..... you might want to be absolutely sure of your fring requirements (oxidation / neutral / reduction , final cone end point , etc.) before you start down the road of building a kiln. That way you'll have the "design requirements" well in hand before starting planning the kiln.
A VERY small, simple, and primitive propane fired kiln can be done with a couple of boxes of insulating firebrick, a small trailer-type propane cylinder, a high pressure regulator, some gas hose, and a small venturi gas burner that you can either buy or make out of pipe fittings. Not all that efficient or controllable... but it will fire clay.
In a real economic pinch you can even make some home-made insulating refractories with simply a fireclay and sawdust mixture and fire them in place. Not elegant or really long lasting.... but they can be cheap and "work".
Any kiln no matter how simple is likely going to take some of those elusive nickels to build/acquire.