You could get some PAR fixtures and power suplies like DJ's would use for party's. The size of the stage would decide what fixture and what wattage. I would't use more than a 500 watt bulb. You culd put up a truss to hand them from, or mount them on a base for footlights. They would be lightweight and easy to transport.

Gaafa ... you're a peach!  Is there anything you haven't done?!  Seriously, though, I live in a town of less than 500 people so I don't think I'll find any rock and roll bands or pro venues who are updating their equipment!    I will go, however, with the suggestion of asking around.  Perhaps a local contractor will know an electrician who'd like to help us out.

G'donya Nannette.
The only thing I have not done in theatre is to make any brass out of it & draw the line at windows cleaning,
So all in all after a few days short of  60 years - I’m a  right old failure! Although I could be older, as I have a feeling I was a few years premature & just didn’t front up on cue - but that’s another story.
With the electrical theory this is something which I realised when I was about 9 or 10 having made up a series of home made ‘Salt Water’ Dimmers & a tin can  lighting rig, from used food & ingredient tin cans for my back yard shed theatre, copying the larger salt water dimmers I had worked in the dungeon of the Grand Theatre on Tyneside in the North East of England.
However the smoke theory was formulated & developed further by Joseph Lucas on his web site:-
http://www.peizhang.com/forfun/forfun_writings_smoke.htm
My theatre electric rig was quite spectacular.
Although I was never quite sure what all the fuss was all about at the time? The power in the area was back on within a few minutes!
Anyhow back to your lighting problem even in a small town, by fossicking about bit, especially at Industrial waste locations or building refurbishment sites. You can pick up a lot of discarded gear, even at the local municipal rubbish tip or Council Works Depot with old lighting, cable & electrical fittings.
Or make up your own lights using proprietary brand electrical parts from your local hardware store.
One bush town I made up 8 flood units, each with  4 light fittings in individual cells on separate circuits. That could be used as ground rows, side or over head [Ray] lighting battens. They could be used a separate 4 light units or plugged up into one long unit. I used two lengths of ordinary house rain guttering, joined together to make a trough. Divided it off in separate cell compartments using flat sheet steal cut pieces, just pop riveted in place. Fitting ceramic ES lamp  bases in each cell & ducting the electric’s on the outside of the base behind each lamp fittings. Running septate circuits with a male & female plug tops on each end/circuit, which was used to link units together or use separately on their own.
I added mounting bracket to take hanging C clamps & crossed wires on the front of each cell to take & retain the colour gels - cheap & easy. I think I worked it out at the time to cost only about $11/cell + the globe.
That was 20 years ago & they are still being used at the theatre in that town today!
So with a little bit of help you can have a good lighting rig, not a very pretty - but it works in theatre.
However in all cases get any equipment that is made up or used in theatre tested by a qualified electrician before using it &/or ‘Portable Appliance Tested’ regularly.