look at a real DK 3 by Mr. Don Johnson, the only one you are to mount to ground, all the rest have to be isolated. http://www.hamradiotoys.com/dk3.htm
this guy sells them for don,
you add a 12 volt supply for power and a double throw, double pole, switch for the up and down. you just tune it for maximum rf on a field strength meter. the antenna is designeed to be mounted on a ground ( metal picknick table??) and has a matching network to give you 50 ohms all the time, just run the antenna up and down to max transmited signal on the field strength meter
a Field Strength Meter is basically and antenna 6 inches tall hooked to a diode, and a resistor across a meter movement. the more rf, the more current detected, the higher the reading. when the antenna is resonant it transfers the most signal to the eather so max signal means it's tuned
it is not a 5 element monobander, but it is better than nuttin. you put a 5 to 8 foot whip ( for fixed I would use the full 8 foot or so tall cb whip.) and tune. so antenna all the way down, you get 10 meters ( just the whip is working, the coils are bypassed.) On the other end you have almost all the coils in use and the whip too so you can actually work 80 meters, actually pretty well.
if you use the shortend whip, you can work from 6 meters to 40 meters.
hope this help. Don Johnson is a real guy, his call is on the call search, and he also has a book call mobileering or something like that which is like 50 years of mobile experiance.
also if you can't put up an antenna in the yard, park that extra car, near the house and run your coax to the antenna mounted on the car.
also can you put up a flag pole ?? (force sells a 40 -10 meter flag pole)
any ideas yet..
I was in a restricted apartment, so I put up a fan dipole flat on the back of the roof, it worked and no one ever knew it was there, it 's been 30 years or so, but it may still be there, for a pieece of coax and some wire, I didn't even bother to take it down , I just whacked the coax off and tossed it on the roof.http://www.hamuniverse.com/multidipole.html
73 Tom N6AJR