If you secure a wing properly in the back of your truck ( bungee cords, use tie-downs , stake pockets, etc there is no reason a wing can't stick out over the tailgate, or even lay the tailgate down. Just make sure your entire load is SECURE.
My point is wings can handle 60 mile a hour wind if secured.
The thing I like about 60 size planes is that most people grow to larger sizes, and 40 size stuff tends to collect dust and take up room. Ask at any club and there will be good cp 40 size motors for sale. I have 2 Evolution .46 , a YS pumped 46, a OS 46, and a Saito 65 that are good little motors, but I moved past them pretty quickly. (I will use the Saito in a 40 sized Piper I am rebuilding because the exhaust sounds appropriate.
Having said all that, I would make 2 suggestions... ALPHA 60 RTF if funds aren't a huge factor, or ant high wing 40 and use the motor you have. RTF ( readt to fly) already have servos, motor, etc so no hassles and Combo deals save money.
A 6 channel radio is the LEAST I would use... 72mhz are easy to find cheaply, again ask at a club. I just bought a very nice (like new) Futaba 9C for $100 with 3 receivers. ou can't go wrong with a spread spectrum (2.4) either, and their prices are falling, too.
Have fun and post any questions here at RCU... also let us know how it goes.