GOFORIT !!
I was in the same situation. started with a motor and an obsession. Saved up and bought my yak though most said my 31cc was too much. $200 for yak, $130 for 6 channel radio kit with 4 servos, 3 more servos $30, $20 per prop, servo extensions,glue....etc I'm sure theres more!
I didn't buy any conversion kits just custom mounted motor and prop.
I was so scared to fly it I went bought a used typhoon to teach myself to fly on. after many props i learned.
I was still scared to put the yak up so I just taxied it around skipping up now and then...... The second time I had to fiberglass the fusalage back together I decided if I's gonna wreck it I'm gonna get a good flight. Next day took off like a pro, 4 flights descent landingsand couldn't be more pleased!!
Flies better than my typhoon.

I agree that althought anything is possible, a trainer plane and a experienced buddy would be the easiest.
BUTIWANTEDTODOITONMYOWN!!


GOODLUCK