What you’re referring to is essentially a fan end fed half wave, with similar construction to a fan dipole. Bottom line - this doesn’t work.
Why?
EFHW antennas are fed at a the voltage maximum/current minimum which is the high impedance point on the antenna. Dipoles are fed at the voltage minimum/current maximum which is the minimum impedance point on the antenna. In the dipole, the non-resonant lengths of wire present a higher impedance and the current flows down the proper wire. In the fan EFHW, the non-resonant wires will present a lower impedance and will take the current even though there is an impedance mismatch. The result will be high SWR.
That said, the nice thing about the EFHW is that it’s resonant on all even and odd harmonics. So a 40m EFHW is resonant on 20m, 15m, and 10m (sometimes with a little tweaking). Other bands like 17m, 12m, or 30m can easily be added with links.
Adam
K6ARK